[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Brad Figg]

** Tags added: cscc

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  Won't Fix
Status in linux source package in Xenial:
  Fix Released
Status in linux source package in Yakkety:
  Fix Released
Status in linux source package in Zesty:
  Fix Released

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Salem HMOUDI]

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2019-3462

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  Won't Fix
Status in linux source package in Xenial:
  Fix Released
Status in linux source package in Yakkety:
  Fix Released
Status in linux source package in Zesty:
  Fix Released

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Brad Figg]

** Changed in: linux (Ubuntu Trusty)
   Status: In Progress => Won't Fix

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  Won't Fix
Status in linux source package in Xenial:
  Fix Released
Status in linux source package in Yakkety:
  Fix Released
Status in linux source package in Zesty:
  Fix Released

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Launchpad Bug Tracker]

This bug was fixed in the package linux - 4.4.0-75.96

---
linux (4.4.0-75.96) xenial; urgency=low

  * linux: 4.4.0-75.96 -proposed tracker (LP: #1684441)

  * [Hyper-V] hv: util: move waiting for release to hv_utils_transport itself
(LP: #1682561)
- Drivers: hv: util: move waiting for release to hv_utils_transport itself

linux (4.4.0-74.95) xenial; urgency=low

  * linux: 4.4.0-74.95 -proposed tracker (LP: #1682041)

  * [Hyper-V] hv: vmbus: Raise retry/wait limits in vmbus_post_msg()
(LP: #1681893)
- Drivers: hv: vmbus: Raise retry/wait limits in vmbus_post_msg()

linux (4.4.0-73.94) xenial; urgency=low

  * linux: 4.4.0-73.94 -proposed tracker (LP: #1680416)

  * CVE-2017-6353
- sctp: deny peeloff operation on asocs with threads sleeping on it

  * vfat: missing iso8859-1 charset (LP: #1677230)
- [Config] NLS_ISO8859_1=y

  * Regression: KVM modules should be on main kernel package (LP: #1678099)
- [Config] powerpc: Add kvm-hv and kvm-pr to the generic inclusion list

  * linux-lts-xenial 4.4.0-63.84~14.04.2 ADT test failure with linux-lts-xenial
4.4.0-63.84~14.04.2 (LP: #1664912)
- SAUCE: apparmor: fix link auditing failure due to, uninitialized var

  * regession tests failing after stackprofile test is run (LP: #1661030)
- SAUCE: fix regression with domain change in complain mode

  * Permission denied and inconsistent behavior in complain mode with 'ip netns
list' command (LP: #1648903)
- SAUCE: fix regression with domain change in complain mode

  * unexpected errno=13 and disconnected path when trying to open /proc/1/ns/mnt
from a unshared mount namespace (LP: #1656121)
- SAUCE: apparmor: null profiles should inherit parent control flags

  * apparmor refcount leak of profile namespace when removing profiles
(LP: #1660849)
- SAUCE: apparmor: fix ns ref count link when removing profiles from policy

  * tor in lxd: apparmor="DENIED" operation="change_onexec"
namespace="root//CONTAINERNAME_" profile="unconfined"
name="system_tor" (LP: #1648143)
- SAUCE: apparmor: Fix no_new_privs blocking change_onexec when using 
stacked
  namespaces

  * apparmor oops in bind_mnt when dev_path lookup fails (LP: #1660840)
- SAUCE: apparmor: fix oops in bind_mnt when dev_path lookup fails

  * apparmor  auditing denied access of special apparmor .null fi\ le
(LP: #1660836)
- SAUCE: apparmor: Don't audit denied access of special apparmor .null file

  * apparmor label leak when new label is unused (LP: #1660834)
- SAUCE: apparmor: fix label leak when new label is unused

  * apparmor reference count bug in label_merge_insert() (LP: #1660833)
- SAUCE: apparmor: fix reference count bug in label_merge_insert()

  * apparmor's raw_data file in securityfs is sometimes truncated (LP: #1638996)
- SAUCE: apparmor: fix replacement race in reading rawdata

  * unix domain socket cross permission check failing with nested namespaces
(LP: #1660832)
- SAUCE: apparmor: fix cross ns perm of unix domain sockets

  * Xenial update to v4.4.59 stable release (LP: #1678960)
- xfrm: policy: init locks early
- virtio_balloon: init 1st buffer in stats vq
- pinctrl: qcom: Don't clear status bit on irq_unmask
- c6x/ptrace: Remove useless PTRACE_SETREGSET implementation
- h8300/ptrace: Fix incorrect register transfer count
- mips/ptrace: Preserve previous registers for short regset write
- sparc/ptrace: Preserve previous registers for short regset write
- metag/ptrace: Preserve previous registers for short regset write
- metag/ptrace: Provide default TXSTATUS for short NT_PRSTATUS
- metag/ptrace: Reject partial NT_METAG_RPIPE writes
- fscrypt: remove broken support for detecting keyring key revocation
- sched/rt: Add a missing rescheduling point
- Linux 4.4.59

  * Update ENA driver to 1.1.2 from net-next (LP: #1664312)
- net: ena: Remove unnecessary pci_set_drvdata()
- net: ena: Fix error return code in ena_device_init()
- net: ena: change the return type of ena_set_push_mode() to be void.
- net: ena: use setup_timer() and mod_timer()
- net/ena: remove ntuple filter support from device feature list
- net/ena: fix queues number calculation
- net/ena: fix ethtool RSS flow configuration
- net/ena: fix RSS default hash configuration
- net/ena: fix NULL dereference when removing the driver after device reset
  failed
- net/ena: refactor ena_get_stats64 to be atomic context safe
- net/ena: fix potential access to freed memory during device reset
- net/ena: use READ_ONCE to access completion descriptors
- net/ena: reduce the severity of ena printouts
- net/ena: change driver's default timeouts
- net/ena: change condition for host attribute configuration
- net/ena: update driver version to 1.1.2

  * Xenial update to v4.4.58 stable release (LP: #1677600)
- net/openvswitch: Set the ipv6 source tunnel key 

[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Launchpad Bug Tracker]

This bug was fixed in the package linux - 4.8.0-49.52

---
linux (4.8.0-49.52) yakkety; urgency=low

  * linux: 4.8.0-49.52 -proposed tracker (LP: #1684427)

  * [Hyper-V] hv: util: move waiting for release to hv_utils_transport itself
(LP: #1682561)
- Drivers: hv: util: move waiting for release to hv_utils_transport itself

linux (4.8.0-48.51) yakkety; urgency=low

  * linux: 4.8.0-48.51 -proposed tracker (LP: #1682034)

  * [Hyper-V] hv: vmbus: Raise retry/wait limits in vmbus_post_msg()
(LP: #1681893)
- Drivers: hv: vmbus: Raise retry/wait limits in vmbus_post_msg()

linux (4.8.0-47.50) yakkety; urgency=low

  * linux: 4.8.0-47.50 -proposed tracker (LP: #1679678)

  * CVE-2017-6353
- sctp: deny peeloff operation on asocs with threads sleeping on it

  * CVE-2017-5986
- sctp: avoid BUG_ON on sctp_wait_for_sndbuf

  * vfat: missing iso8859-1 charset (LP: #1677230)
- [Config] NLS_ISO8859_1=y

  * [Hyper-V] pci-hyperv: Use device serial number as PCI domain (LP: #1667527)
- net/mlx4_core: Use cq quota in SRIOV when creating completion EQs

  * Regression: KVM modules should be on main kernel package (LP: #1678099)
- [Config] powerpc: Add kvm-hv and kvm-pr to the generic inclusion list

  * linux-lts-xenial 4.4.0-63.84~14.04.2 ADT test failure with linux-lts-xenial
4.4.0-63.84~14.04.2 (LP: #1664912)
- SAUCE: apparmor: fix link auditing failure due to, uninitialized var

  * regession tests failing after stackprofile test is run (LP: #1661030)
- SAUCE: fix regression with domain change in complain mode

  * Permission denied and inconsistent behavior in complain mode with 'ip netns
list' command (LP: #1648903)
- SAUCE: fix regression with domain change in complain mode

  * unexpected errno=13 and disconnected path when trying to open /proc/1/ns/mnt
from a unshared mount namespace (LP: #1656121)
- SAUCE: apparmor: null profiles should inherit parent control flags

  * apparmor refcount leak of profile namespace when removing profiles
(LP: #1660849)
- SAUCE: apparmor: fix ns ref count link when removing profiles from policy

  * tor in lxd: apparmor="DENIED" operation="change_onexec"
namespace="root//CONTAINERNAME_" profile="unconfined"
name="system_tor" (LP: #1648143)
- SAUCE: apparmor: Fix no_new_privs blocking change_onexec when using 
stacked
  namespaces

  * apparmor oops in bind_mnt when dev_path lookup fails (LP: #1660840)
- SAUCE: apparmor: fix oops in bind_mnt when dev_path lookup fails

  * apparmor  auditing denied access of special apparmor .null fi\ le
(LP: #1660836)
- SAUCE: apparmor: Don't audit denied access of special apparmor .null file

  * apparmor label leak when new label is unused (LP: #1660834)
- SAUCE: apparmor: fix label leak when new label is unused

  * apparmor reference count bug in label_merge_insert() (LP: #1660833)
- SAUCE: apparmor: fix reference count bug in label_merge_insert()

  * apparmor's raw_data file in securityfs is sometimes truncated (LP: #1638996)
- SAUCE: apparmor: fix replacement race in reading rawdata

  * unix domain socket cross permission check failing with nested namespaces
(LP: #1660832)
- SAUCE: apparmor: fix cross ns perm of unix domain sockets

  * [Hyper-V][Mellanox] net/mlx4_core: Avoid delays during VF driver device
shutdown (LP: #1672785)
- Revert "net/mlx4_en: Avoid unregister_netdev at shutdown flow"
- net/mlx4_core: Avoid delays during VF driver device shutdown

  * Update ENA driver to 1.1.2 from net-next (LP: #1664312)
- net: ena: Remove unnecessary pci_set_drvdata()
- net: ena: Fix error return code in ena_device_init()
- net: ena: change the return type of ena_set_push_mode() to be void.
- net: ena: use setup_timer() and mod_timer()
- net/ena: remove ntuple filter support from device feature list
- net/ena: fix queues number calculation
- net/ena: fix ethtool RSS flow configuration
- net/ena: fix RSS default hash configuration
- net/ena: fix NULL dereference when removing the driver after device reset
  failed
- net/ena: refactor ena_get_stats64 to be atomic context safe
- net/ena: fix potential access to freed memory during device reset
- net/ena: use READ_ONCE to access completion descriptors
- net/ena: reduce the severity of ena printouts
- net/ena: change driver's default timeouts
- net/ena: change condition for host attribute configuration
- net/ena: update driver version to 1.1.2

  * ISST-LTE:pVM:roselp4:ubuntu16.04.2: number of numa_miss and numa_foreign
wrong in numastat (LP: #1672953)
- mm: fix remote numa hits statistics
- mm: get rid of __GFP_OTHER_NODE

  * Using an NVMe drive causes huge power drain (LP: #1664602)
- nvme/scsi: Remove power management support
- nvme: Pass pointers, not dma addresses, to nvme_get/set_features()
- nvme: introduce struct nvme_request
- nvme: Add a quirk 

[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Thadeu Lima de Souza Cascardo]

This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
yakkety' to 'verification-done-yakkety'. If the problem still exists,
change the tag 'verification-needed-yakkety' to 'verification-failed-
yakkety'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-yakkety

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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Released

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

-- 
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Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp

[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Thadeu Lima de Souza Cascardo]

This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
xenial' to 'verification-done-xenial'. If the problem still exists,
change the tag 'verification-needed-xenial' to 'verification-failed-
xenial'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-xenial

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Released

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

The fixes for Xenial, Yakkety and Zesty are committed or released.

However, I built one more Trusty test kernel with all of the prereq
commits and the patches.  Would it be possible to have this kernel
tested one more time before it is SRU'd?  It would be good to confirm no
regressions are introduced in Trusty due to the number of changes
needed.  It can be downloaded from:

http://kernel.ubuntu.com/~jsalisbury/lp1470250/trusty/

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Released

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

Trusty requires quite a few prereq commits(See comment #353), so it's
SRU will be a little behind.  However, it will be SRU'd shortly as well.

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Released

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Emsi]

How about rusty?

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Released

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Tim Gardner]

** Changed in: linux (Ubuntu Zesty)
   Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Released

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Brad Figg]

** Changed in: linux (Ubuntu Xenial)
   Status: In Progress => Fix Committed

** Changed in: linux (Ubuntu Yakkety)
   Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

Sorry guys I had been swamped with other stuff and then simply forgot to test 
@alexng's patch
I ran it overnight on my original test setup and it also worked for me.

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Alex Ng]

The patch from @faulpeltz hasn't been mainlined because of some feedback
that it shouldn't have to close and reopen the /dev/vmbus/hv_vss device
after failure.

I addressed this comment this in a modified version of @faulpeltz's
patch (see comment #345).

I haven't heard from @faulpeltz whether he's tested it. From my testing,
it seems fine and I expect to resubmit it upstream. If we can make it a
SAUCE patch, that would be nice.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joshua R. Poulson]

By the way, the "operation times should match host expectation" patch in
#343 (and listed in #347) is upstream:

commit b357fd3908c1191f2f56e38aa77f2aecdae18bc8
Author: Alex Ng 
Date:   Sun Nov 6 13:14:11 2016 -0800

Drivers: hv: vss: Operation timeouts should match host expectation

Increase the timeout of backup operations. When system is under I/O load,
it needs more time to freeze. These timeout values should also match the
host timeout values more closely.

Signed-off-by: Alex Ng 
Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Greg Kroah-Hartman 

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joshua R. Poulson]

That patch was submitted upstream under the title "[PATCH] Tools: hv:
recover after hv_vss_daemon freeze times out" but I don't see that it
was committed. I'll poke around.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

The patch from @faulpeltz posted in comment #345 has never landed in
mainline.  Is there plans for this patch to be sent upstream, or do we
just want to include it as a SAUCE patch?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Emsi]

I can confirm that the trusty patches are preventing the filesystem
failure.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

Just waiting on test results for Trusty per comments #352 and #353.  It
sounds like the test kernels resolved the issue?  If that is the case,
I'll submit the SRU request.

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Alex Ng]

Hi @jsalisbury,

Any status update on the patches for this issue?

It appears the test kernels have resolved the issue.

Let us know if you need additional testing or have questions about the
patches.

Thanks,
Alex

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Brian Vargyas]

So I'm the OP on this bug report from what seems like ages ago...
While a lot of hard work as been done by some of the members posting
here to try and replicate it, it's been very difficult to track the
specific event that has been causing this.While we "fixed" our
problem a long time ago by moving all the VM's effected to a server and
disabling Hyper-V nightly snapshots, instead opting to shut down all
VM's once a month on a weekend and shapshot the whole system and bring
it back online, it hasn't been optimal.

Lately, we've been upgrading the 14.04LTS systems one at a time to 16.04
with the latest kernel and dropping them back into active nightly backup
systems and so far, have not seen a read-only file system failure with
systems running the latest updates.   Now these systems are not write
heavy either, which tends to trigger this bug more often.  At least
we've seen some improvement in our environment just by keeping up to
date with the latest distribution updates.  Outside of this, microsoft
has released server 2016 during our lifetime, and while we are not
running, it would be interesting to see if that Hyper-V server OS is any
better/worse then 2012R2.

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You received this bug notification because you are a member of Kernel
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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[David]

Yeah an official fix would be nice. I am tired of getting up early to
see if I have to reboot any vm's :)

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[James Straub]

It's been more than 1.5 years! 
When can we expect this fix to be released?

$ uname -a
Linux Server123 3.13.0-107-generic #154-Ubuntu SMP Tue Dec 20 09:57:27 UTC 2016 
x86_64 x86_64 x86_64 GNU/Linux

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:Ubuntu 14.04.5 LTS
Release:14.04
Codename:   trusty

Jan 30 01:54:55 Server123 kernel: [78577.687381] cifs_vfs_err: 18 callbacks 
suppressed
Jan 30 01:54:55 Server123 kernel: [78577.687389] CIFS VFS: open dir failed
Jan 30 01:54:55 Server123 kernel: [78577.692074] CIFS VFS: open dir failed
Jan 30 01:54:56 Server123 kernel: [78578.027096] CIFS VFS: open dir failed
Jan 30 01:54:56 Server123 kernel: [78578.031664] CIFS VFS: open dir failed
Jan 30 03:00:27 Server123 Hyper-V VSS: VSS: freeze of /archive: Success
Jan 30 03:00:27 Server123 Hyper-V VSS: VSS: freeze of /: Success
Jan 30 03:00:27 Server123 kernel: [82509.382621] hv_storvsc vmbus_0_1: cmd 0x28 
scsi status 0x2 srb status 0x82
Jan 30 03:00:27 Server123 kernel: [82509.382730] hv_storvsc vmbus_0_1: stor pkt 
8800d306d368 autosense data valid - len 18
Jan 30 03:00:27 Server123 kernel: [82509.382735] storvsc: Sense Key : Unit 
Attention [current]
Jan 30 03:00:27 Server123 kernel: [82509.382741] storvsc: Add. Sense: Changed 
operating definition
Jan 30 03:00:27 Server123 kernel: [82509.382811] sd 2:0:0:0: Warning! Received 
an indication that the operating parameters on this target have changed. The 
Linux SCSI layer does not automatically adjust these parameters.
Jan 30 03:00:27 Server123 Hyper-V VSS: VSS: thaw of /archive: Success
Jan 30 03:00:27 Server123 Hyper-V VSS: VSS: thaw of /: Success
Jan 30 03:00:57 Server123 kernel: [82539.424627] hv_storvsc vmbus_0_1: cmd 0x2a 
scsi status 0x2 srb status 0x82
Jan 30 03:00:57 Server123 kernel: [82539.424678] hv_storvsc vmbus_0_1: stor pkt 
8800b89df468 autosense data valid - len 18
Jan 30 03:00:57 Server123 kernel: [82539.424683] storvsc: Sense Key : Unit 
Attention [current]
Jan 30 03:00:57 Server123 kernel: [82539.424689] storvsc: Add. Sense: Changed 
operating definition
Jan 30 03:00:57 Server123 kernel: [82539.424834] sd 2:0:0:0: Warning! Received 
an indication that the operating parameters on this target have changed. The 
Linux SCSI layer does not automatically adjust these parameters.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 

[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Emsi]

3.13.0-103-generic #150~lp1470250 SMP  looks promising. 
Several days without crash. I encountered some IO errors but the filesystem 
remains rw.


[Wed Jan 11 13:47:35 2017] hv_storvsc vmbus_0_1: cmd 0x35 scsi status 0x2 srb 
status 0x82
[Wed Jan 11 13:47:35 2017] hv_storvsc vmbus_0_1: stor pkt 8800f0b0f728 
autosense data valid - len 18
[Wed Jan 11 13:47:35 2017] storvsc: Sense Key : Unit Attention [current]
[Wed Jan 11 13:47:35 2017] storvsc: Add. Sense: Changed operating definition
[Wed Jan 11 13:47:35 2017] sd 2:0:0:0: Warning! Received an indication that the 
operating parameters on this target have changed. The
 Linux SCSI layer does not automatically adjust these parameters.
[Wed Jan 11 13:47:35 2017] end_request: I/O error, dev sda, sector 0
[Wed Jan 11 13:48:56 2017] hv_storvsc vmbus_0_1: cmd 0x28 scsi status 0x2 srb 
status 0x82
[Wed Jan 11 13:48:56 2017] hv_storvsc vmbus_0_1: stor pkt 8800f0fa0668 
autosense data valid - len 18
[Wed Jan 11 13:48:56 2017] storvsc: Sense Key : Unit Attention [current]
[Wed Jan 11 13:48:56 2017] storvsc: Add. Sense: Changed operating definition
[Wed Jan 11 13:48:56 2017] sd 2:0:0:0: Warning! Received an indication that the 
operating parameters on this target have changed. The Linux SCSI layer does not 
automatically adjust these parameters.
[Wed Jan 11 14:07:56 2017] hv_storvsc vmbus_0_1: cmd 0x2a scsi status 0x2 srb 
status 0x82
[Wed Jan 11 14:07:56 2017] hv_storvsc vmbus_0_1: stor pkt 8800f0fa50a8 
autosense data valid - len 18
[Wed Jan 11 14:07:56 2017] storvsc: Sense Key : Unit Attention [current]
[Wed Jan 11 14:07:56 2017] storvsc: Add. Sense: Changed operating definition
[Wed Jan 11 14:07:56 2017] sd 2:0:0:0: Warning! Received an indication that the 
operating parameters on this target have changed. The Linux SCSI layer does not 
automatically adjust these parameters.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joshua R. Poulson]

Microsoft will test the trusty kernel in the coming days. The Xenial
kernel may be getting all the patches from the 4.9 rebase that's
currently in progress.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

@Emsi and whoever can test Trusty.  There is a test kernel available at:
http://kernel.ubuntu.com/~jsalisbury/lp1470250/trusty

This test kernel has the updated 3 patches.  It also required 19
prerequisite patches.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

For those interested, the Trusty test kernel contains the following
commits:

e81d871 UBUNTU: SAUCE: (no-up) Tools: hv: vss: Thaw the filesystem and continue 
after freeze fails
01032c1 UBUNTU: SAUCE: (no-up) Drivers: hv: vss: Operation timeouts should 
match host expectation
4a6f680 Drivers: hv: utils: Continue to poll VSS channel after handling 
requests.
61c18ef Drivers: hv: kvp: fix IP Failover
db70a1c Drivers: hv: utils: Invoke the poll function after handshake
3c8486d Drivers: hv: utils: run polling callback always in interrupt context
e6e9811 Drivers: hv: fcopy: full handshake support
8f0d521 Drivers: hv: vss: full handshake support
8b167aa Tools: hv: vss: use misc char device to communicate with kernel
6712c24 Drivers: hv: kvp: convert to hv_utils_transport
e5bd829 Drivers: hv: fcopy: convert to hv_utils_transport
9ec74ad Drivers: hv: vss: convert to hv_utils_transport
a2adece Drivers: hv: util: introduce hv_utils_transport abstraction
7aa0716 Drivers: hv: fcopy: switch to using the hvutil_device_state state 
machine
d804513 Drivers: hv: vss: switch to using the hvutil_device_state state machine
5c9bfa1 Drivers: hv: kvp: switch to using the hvutil_device_state state machine
11aef70 Drivers: hv: fcopy: rename fcopy_work -> fcopy_timeout_work
742f132 Drivers: hv: kvp: rename kvp_work -> kvp_timeout_work
a5a8e26 Drivers: hv: kvp,vss: Fast propagation of userspace communication 
failure
77fbf9a Drivers: hv: vss: Introduce timeout for communication with userspace
d1401e0 Tools: hv: vssdaemon: ignore the EBUSY on multiple freezing the same 
partition
fcee4902 connector: add portid to unicast in addition to broadcasting

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

@Emsi, right now there are only Xenial and Yakkety test kernels with all
the updated patches.  I will have a Trusty test kernel available
shortly.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Emsi]

The link to trusty kernels is gone :(
http://kernel.ubuntu.com/~jsalisbury/lp1470250/AlexFaulpeltzPatch/trusty/

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

I built Yakkety and Xenial test kernels with the three patches mentioned
in comment #347.  It would be great if these test kernels can be tested.
If they resolve the bug, I'll submit and SRU request to have them
included in Yakkety and Xenial.

The test kernels can be downloaded from:
Xenial: http://kernel.ubuntu.com/~jsalisbury/lp1470250/xenial/
Yakkety: http://kernel.ubuntu.com/~jsalisbury/lp1470250/yakkety


The Trusty kernel requires quite a bit of prerequisites commits and 
backporting.  I'll post a trusty test kernel once it's available.

The Zesty kernel will pick up these patches when they land in mainline.
The patches will be SRU'd to Zesty if they don't land in mainline in
time for release.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Alex Ng]

Thanks Joseph for compiling the list. The patches you've outlined should
be sufficient.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

@faulpeltz, Thanks for the update.  I'll build a test kernel with all
the latest patches and backport them to prior releases.

Just to confirm, so I build the test kernels with everything needed, we
need the following:

New patch from comment #343:
Drivers: hv: vss: Operation timeouts should match host expectation

The updated patch from @faulpeltz posted in comment #343
Tools: hv: vss: Thaw the filesystem and continue after freeze fails

And lastly, Alex's patch, which has already landed in mainline: 
497af84 Drivers: hv: utils: Continue to poll VSS channel after handling 
requests.



I have not submitted an SRU request for these three patches yet.  I just want 
to confirm all we need are these three patches, and have good testing feedback.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

** Also affects: linux (Ubuntu Zesty)
   Importance: Critical
 Assignee: Joseph Salisbury (jsalisbury)
   Status: In Progress

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

@Alex
I will try as soon as I have some spare time

@jsalisbury
Unfortunately I didnt have time to test the kernel from #341.
Including the #343 upstream commit should take care of our issue, and using the 
patch from #345 (replacing my initial patch) should prevent any hv_vss_daemon 
crashes in extremely slow cases

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Alex Ng]

@faulpeltz
I agree. Your patch should also be included in case a FREEZE operation does 
exceed the increased timeout.

I've attached a modified version of your patch that addresses some
concerns we had offline. Could you give it a try?

** Patch added: 
"0004-Tools-hv-vss-Thaw-the-filesystem-and-continue-after-.patch"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+attachment/4778824/+files/0004-Tools-hv-vss-Thaw-the-filesystem-and-continue-after-.patch

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

@Alex
The modified timeout should take care of the issue, but I think its a good idea 
for the VSS daemon to issue a THAW before either exiting or trying to recover

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Alex Ng]

I'll let @jsalisbury comment on the status of his backported patches.

@jsalisbury, I'd also take this recently submitted patch from upstream
kernel as well. It ensures that the VSS driver doesn't timeout any long
running FREEZE operations too early. This should preclude the need for
faulpeltz's patch in most cases, unless the FREEZE operation takes
extraordinarily long (> 15 mins).

https://git.kernel.org/cgit/linux/kernel/git/next/linux-
next.git/commit/drivers/hv?id=b357fd3908c1191f2f56e38aa77f2aecdae18bc8

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Benjamin Ihrig]

Any news on this? Recently it seemed like a fix was found, but no update
for about a month now.

Thanks guys!

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

I was able to backport the two patches to Trusty.  It required quite a
few prerequisite commits.  The following commits were backported to a
Trusty test kernel:

f9cc88d lp1470250: patch from faulpeltz
6f3e8a2 Drivers: hv: utils: Continue to poll VSS channel after handling 
requests.
725a85d Drivers: hv: utils: fix a race on userspace daemons registration
a0c12c6 Drivers: hv: kvp: fix IP Failover
51fea7d Drivers: hv: utils: Invoke the poll function after handshake
42fb309 Drivers: hv: utils: run polling callback always in interrupt context
505de58 Drivers: hv: fcopy: full handshake support
2ec9789 Drivers: hv: vss: full handshake support
e12c519 Tools: hv: vss: use misc char device to communicate with kernel
1f3abc0 Drivers: hv: kvp: convert to hv_utils_transport
d789589 Drivers: hv: fcopy: convert to hv_utils_transport
51ed5da Drivers: hv: vss: convert to hv_utils_transport
edbff5d Drivers: hv: util: introduce hv_utils_transport abstraction
056fbb5 Drivers: hv: fcopy: switch to using the hvutil_device_state state 
machine
5eb0af4 Drivers: hv: vss: switch to using the hvutil_device_state state machine
a170e78 Drivers: hv: kvp: switch to using the hvutil_device_state state machine
a539598 Drivers: hv: fcopy: rename fcopy_work -> fcopy_timeout_work
7894b35 Drivers: hv: kvp: rename kvp_work -> kvp_timeout_work
d3fc031 Drivers: hv: kvp,vss: Fast propagation of userspace communication 
failure
ee85362 Drivers: hv: vss: Introduce timeout for communication with userspace
d714c5a Tools: hv: vssdaemon: ignore the EBUSY on multiple freezing the same 
partition
b957545 connector: add portid to unicast in addition to broadcasting



The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1470250/AlexFaulpeltzPatch/trusty/


Can this kernel be tested to see if it resolves this bug?  

Note, that both the linux-image and linux-image-extra .deb packages need
to be installed.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Alex Ng]

Thanks @faulpeltz for the info.

I sent you a private message with the list of maintainers to send the
patch (trying to avoid pasting it here in case spam bots can go through
this archive).

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

@Alex
1) Yes, but I might need some help with that. Which list/maintainer should I 
submit it to?

2) On our test machine, with both the hyper-v host as well as the guest under 
heavy i/o load, it was a few hundred ms but with high variance and spiking 
(quite often) in to the 2-4s range, with some extreme values being 10s and 
more. 
I assume that this varies a lot with regards to the test hardware, especially 
storage.
With light load (but not idle) this was well in the <100ms range but with 
occasional spikes.
Another thing I noticed was that the freeze operation often took a lot longer 
(but not always) when triggered directly by the vss daemon through a host 
backup and not just from a standalone test program which just called 
FREEZE/THAW in a loop.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Alex Ng]

Hi @faulpeltz,

A few questions/comments about your patch:

1) Can you submit your patch to the upstream kernel?
2) Under load, were you able to measure how long the FIFREEZE operation took 
before it succeeded? I'm trying to see if we can increase the timeout of the 
kernel driver before it hits the error condition that you encountered.

Thanks,
Alex

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

There should be a Trusty test kernel soon.  I've had to identify 13
prereq commits to get the two patches to apply and build properly.

For Xenial and newer, there has been positive test results from Emsi and
faulpeltz with Alexs' patch and the one from faulpeltz.  Are we
comfortable with submitting an SRU request for those two patches, or do
we think more testing is required.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Brad Figg]

** No longer affects: linux (Ubuntu Wily)

** No longer affects: linux (Ubuntu Vivid)

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Emsi]

Thank you for the update. I'm staying tuned :)

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

I'm still working on getting a Trusty test kernel build with both
patches.  Alexs' patch is requiring some prereq commits to work with
Trusty.  I should have a test kernel ready shortly.

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

Thanks for the update.  I'll rebuild the 14.04 test kernel, but this
time with both patches.  That is what the Xenial test kernel has.

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Emsi]

No luck with 14.04. After couple of days two test machines restarted 
unexpectedly at the very same moment. I sustepct kernel crash but the virtual 
console is gone and nothing was logged.
On the other hand the xenial machine is working for weeks now without any 
issues.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Emsi]

Over 24h of trusty tests under heavy load and so good so far.
IMHO the kernel patch should suffice. I don't see "trying to recover VSS 
connection" messages neither on 16.04 kernel nor 14.04.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

@faulpeltz, have had a chance to test the Trusty kernel, posted in
comment #323?  That kernel only has your patch and not Alex's.  It would
be good to know if both are needed.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

We moved some machines back to their regular backup schedule with the
new kernel, no problems so far

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joshua R. Poulson]

Er, not "filesystem system" but "filesystem consistent".

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joshua R. Poulson]

@trash1-z,

Application-consistent backups will fall back to filesystem system
backups as before as there is no API for informing Linux applications to
complete operations for a backup. VSS has used filesystem freeze
operations for years to do backups on Linux.

Hyper-V integration services is integrated into the Ubuntu kernel
through our collaboration with Canonical, and is quite up to date in
Xenial.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Emsi]

The xenial kernel works like a charm since the patch. Great work! :)
I'm using application consistent backup (the Hyper-V signals snapshot to the 
guest OS) rather than crash consistent (snapshoting without informing the 
guest). The Hyper-h integration services in the guest are required for that 
(I'm using ubuntu cloud images that are preloaded with that).

I'll test the trusty patches now.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Jason]

I was able to patch the kernel, however the fault still exists. I'm
uncertain if issue is related to VSS, but in ballpark (see screenshots).
Ubuntu 16.04.1 on same server smooth as silk.

** Attachment added: "Ubuntu Error 4c.png"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+attachment/4742912/+files/Ubuntu%20Error%204c.png

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

You can install the .deb packages by using the dpkg command from a
terminal.  For example:

sudo dpkg -i linux-
image-3.13.0-95-generic_3.13.0-95.142~lp1470250faulpeltzPatchBAckported_amd64.deb

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Jason]

I'd love to. Can you advise how I do that? I'm a good typist, but cut n
paste is so much better!

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

I backported the patch from faulpeltz to trusty and built a test kernel.
The test kernel can be downloaded from:

http://kernel.ubuntu.com/~jsalisbury/lp1470250/trusty/

Can you give this kernel a test?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Emsi]

I'm really looking forward to test the path on trusty.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Emsi]

Yes.
Linux backup-01 4.4.0-36-generic #55~lp1470250PatchedAlexFaulpeltz SMP Wed Aug 
31 16:14:16 UTC 20 x86_64 x86_64 x86_64 GNU/Linux

Another 24h and no crash.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

@Emsi, that is great news.  Is this with the kernel that includes both
the patch from Alex and the one from faulpeltz, which was posted in
comment #317?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Emsi]

It looks like it does the trick! Already over 90h of testing with tiobench and 
it works like a charm!
Usually it took less than 4h (several at best) to crash.

-- 
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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joshua R. Poulson]

Alex's patch is in commit
http://git.kernel.org/cgit/linux/kernel/git/next/linux-
next.git/commit/?id=497af84b81b98b27e9ba7aebb8a373412e328497

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

I built a Xenial test kernel with the first patch from Alex and the
patch from faulpeltz.  The test kernel can be downloaded from:

http://kernel.ubuntu.com/~jsalisbury/lp1470250/AlexFaulpeltzPatch/xenial/

A little backporting is needed to get the patches to apply to Trusty,
but I'll also post that kernel shortly.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

@faulpeltz, that is great work creating the new patch.  I'll build test
kernels for all releases with the first patch from Alex and your patch
posted in comment #313.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Ubuntu Foundations Team Bug Bot]

** Tags added: patch

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

@Frederik: yes, as far as I have seen. The file systems are still frozen 
between FREEZE and THAW, which in the case of timeouts, is >10s, I have seen 
about 30s in some of our error cases. But they do recover.
I only tried the patched 4.4.0-34 version for now, though
Some testing would be appreciated by everyone here I think :)
The kernel version I tried is ubuntu-xenial 4.4.0-34 with @alexng patch 1/2 
from #308 and my patch

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@faulpletz Do you mean with "and the guest systems continue to work
normally" that the guest does not have any read-only problems any more
with your patch?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

I spent some time investigating our issue further.
As far as I can tell, the main issue is that ioctl(FIFREEZE) can take a long 
time when running VSS backups, and the default timeout is 10s. 
This is very noticeable under load, with rare peaks of >5s seen, so 10s seem 
plausible

If the timeout is hit in the kernel module, the hv_vss_daemon doesnt recover 
and quits, with the FS still frozen.
This fixes some HV VSS daemon behavior where it doesnt recover on a write 
failed if the previous request timed out (e.g. THAW takes too long)
We are currently running this patch including @AlexNg 's patch (1 of 2) in the 
usual backup loop
We already hit the bug at least 5 times, which causes the VSS backup to fail, 
but subsequent backups work without problems, and the guest systems continue to 
work normally

** Patch added: "Experimental fix/workaround for hv_vss_daemon (based on 
4.4.0-34)"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+attachment/4730147/+files/vss_timeout_fix.patch

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Alex Ng]

One reason you may see the timeout messages is due to having a mismatch
between the user-space hv_vss_daemon version and the kernel version.

Can you rebuild the user-space hv_vss_daemon under the source tree's
tools/hv directory and replace the one provided that's provided in
Ubuntu by default?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Alex Ng]

And in response to Joseph's comment #309, the second patch shouldn't be
required as it's related to a feature introduced in Windows Server 2016
(I'm assuming you folks are testing in Windows Server 2012 R2).

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

v4.8-rc2 (with patch 1/2 from #308) failed after 18h :(

With the first patch applied, the VSS daemon decides to quit, but a THAW
is missing after the FREEZE there are the usual syscall timeouts
afterwards

kernel: sd 2:0:0:0: [storvsc] Add. Sense: Changed operating definition
kernel: sd 2:0:0:0: Warning! Received an indication that the operating 
parameters on this target have changed. The Linux SCSI layer does not automa
kernel: hv_utils: VSS: timeout waiting for daemon to reply
kernel: hv_utils: VSS: Transaction not active
systemd[1]: hv-vss-daemon.service: Main process exited, code=exited, 
status=1/FAILURE
unknown[2966]: Hyper-V VSS: VSS: op=FREEZE: succeeded
systemd[1]: hv-vss-daemon.service: Unit entered failed state.
unknown[2966]: Hyper-V VSS: write failed; error: 22 Invalid argument
systemd[1]: hv-vss-daemon.service: Failed with result 'exit-code'.
kernel: hv_utils: VSS: failed to communicate to the daemon: -22

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

I built a v4.8-rc2 test kernel with the first patch Alex mentions in
comment #308.  Can this kernel be tested to see if it still exhibits the
bug?

The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1470250/081816-Patch/

Alex, do you think we need the second patch for testing of this
particular bug?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Alex Ng]

Might be worth trying this patchset: https://lkml.org/lkml/2016/8/18/859

The first patch in the set addresses some issues with VSS that would
cause it to take a long time to initiate backup (and even may timeout).

The second patch is not necessary (but will need VSS daemon to be
replaced if you choose to apply it).

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

unfortunately still the same problem using the v4.8 tools
(on 4.4 and up it doesnt remount the filesystem read-only, it just hangs on any 
write operation)

dmesg output:
[30626.788513] hv_utils: VSS: timeout waiting for daemon to reply
[30627.100164] hv_utils: VSS: Transaction not active
[30813.152039] INFO: task rs:main Q:Reg:1765 blocked for more than 120 seconds.
[30813.152569]   Not tainted 4.8.0-040800rc1-generic #201608072231
[30813.153094] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[30813.153627] rs:main Q:Reg   D 8b44c2657fc0 0  1765  1 0x
[30813.153630]  8b44c14d0300 8b44b2b2e9c0 854a7bc8 
8b44b14a8000
[30813.153631]  8b44b14a7e78 8b44ae46c2c8  
8b44ae46c2e0
[30813.153632]  8b44b14a7e10 94215131 8b44b2b2e9c0 
94217a8a
[30813.153633] Call Trace:
[30813.153637]  [] ? schedule+0x31/0x80
[30813.153639]  [] ? rwsem_down_read_failed+0xfa/0x150
[30813.153640]  [] ? call_rwsem_down_read_failed+0x14/0x30
[30813.153642]  [] ? percpu_down_read+0x30/0x50
[30813.153644]  [] ? __sb_start_write+0x26/0x30
[30813.153645]  [] ? vfs_write+0x173/0x190
[30813.153646]  [] ? SyS_write+0x52/0xc0
[30813.153647]  [] ? entry_SYSCALL_64_fastpath+0x1e/0xa8
(repeats every 120 seconds)

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

@faulpeltz, I created athe tools and uploaded them to:
http://kernel.ubuntu.com/~jsalisbury/lp1470250/v4.8-rc2/

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

488347f seems stable after 25h
4.8-rc1 crashed/hung after ~7h, but I didnt have the 4.8 cloud tools (using the 
4.4 ones), 
@jsalisbury: maybe you could build those?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

@jsalisbury: Yes, as far as I can trust my results

Currently running 488347f (which is reasonably close to 71425a9)
If the current one doesnt fail I would test d215f91 next, then 71425a9 and the 
4.8rc1 mainline

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

@faulpeltz, so it sounds like we can confirm the latest commit to pass
in 3.13.0-34 is 95d1181?

If that is the case, it might be worthwhile for me to build a test
kernel with d215f91 as tip of the tree and a second kernel with 71425a9
as the tip.  Just let me know if you could test those two additional
kernels and I'll build them.

In addition, the v4.8-rc1 mainline kernel is now available.  There is
always the change, that this bug was fixed there and we can "Reverse"
bisect.  4.8-rc1 is available here:

http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8-rc1/

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

Currently re-running a few test kernels.
Current results:
3.13.0-35-generic #62-Commitd215f91Reverted: BAD
3.13.0-34-generic #61 @4c48c359b: GOOD
3.13.0-34-generic #61 @95d1181: GOOD

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@Tommy Eriksen, I believe the current status is that we have no idea.
Every time when I think we are getting close on the cause of the
problem, there comes proof that it is not the cause of the problems. For
us it already critical for months.

We are in the middle of moving our systems. I know @jsalisbury is doing
the best he can and @faulpeltz is doing his best effort too, but the
truth is that we are nowhere. It can still take months for the issue to
be solved.

Sorry for this message, but I think we should be clear on this. This
problem can only be solved with extra (testing) manpower.

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Tommy Eriksen]

Hi Guys,

Any news on the testing? We have an increasingly large number of servers
failing after their backup run; it is getting a bit critical,
unfortunately.

Thanks a lot,
Tommy

-- 
You received this bug notification because you are a member of Kernel
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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

Update (no real results yet)
I tried to improve on the test cycle by stopping the hyper-v backup immediately 
after it has begun, then waiting until the delta disks have been merged back 
(rinse and repeat)
It took some time to get stable but it seems to have a 6-7x speedup compared to 
the original variant. 
Currently running various kernels, unfortunately we have to rebuild parts of 
our test environment because it seems like cheap SSDs dont like 600TB writen to 
them...

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

I built a 3.13.0-35.62 kernel with d215f91 reverted.  It is available
here:

http://kernel.ubuntu.com/~jsalisbury/lp1470250/d215f91-reverted/3.13.0-35/

Can you test this kernel when you have a chance?  If it runs past the 80
hour mark, I'd say let it run for a week if you can.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

The test kernel I built an post in comment #295 was Ubuntu-3.13.0-86.131
with d215f91 reverted.  However, d215f91 was committed in
Ubuntu-3.13.0-35.61.

I wonder if it could be that the second bad commit is actually between
3.13.0-35.61 and 3.13.0-86.131.

Can you continue to run 4c48c35 from the original bisect and see if it
is good for a long period?

As another test to see if there is a second bad commit added later in
Trusty 3.13, I can build a 3.13.0-35.62 kernel with d215f91 reverted.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

Unfortunately, yes. I did not find any evidence of other Hyper-V/Host related 
problems.
I will try to repro the crash at least once to be sure.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

The Trusty test kernel with d215f91 reverted failed after 80 hours?
That is the kernel that can be downloaded from here:

http://kernel.ubuntu.com/~jsalisbury/lp1470250/d215f91-reverted/trusty/

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

Unfortunately it crashed after about 80 hours.
I am currently running 4c48c35 from the original bisect (95h+)
But things seem increasingly random at this point.
I tweaked the IO load on the host and guest machine and it seems the crashes 
are now reproducible a bit faster, but I think we might need a few ideas on how 
to force the crashes.
I already tried creating and deleting machine snapshots in a loop but that 
didn't do anything.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

@faulpeltz, were you able to run the test kernel with d215f91 reverted
for a long duration, like a week?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

i meant crashed after 12 hours *g*

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

3.14rc crashed after 3.14-rc1
However isn't the crash to be expected in all the mainline kernels >=3.14 since 
d215f91 has not been reverted in them?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

Started run on 3.14-rc1

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

That would be a great test.  I will also be out next week, so it would
be good timing for a week long run.  The reverted test kernel can be
downloaded from:

http://kernel.ubuntu.com/~jsalisbury/lp1470250/d215f91-reverted/trusty/

Before starting that test, can you test the upstream v3.14-rc1 kernel?
It is available from:

http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.14-rc1-trusty/

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

Both crashed, 3.15rc1 after about 20h, 3.14 only after 66h 
I am starting to wonder if it might be a good idea to run the good(?) 
3.13.0-86(+revert) kernel for a week or two to make sure its actually good.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

It's looking like the second bad commit came in the 3.14 or 3.15 kernel.
Can you test the following two mainline kernels:

3.15-rc1: http://kernel.ubuntu.com/~kernel-
ppa/mainline/v3.15-rc1-trusty/

3.14 final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.14-trusty/

These won't have hte cloud tools built, but you should be able to use
the 3.16 version like you used in comment #285.  Let me know if you
can't, and I'll see if I can build them.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

Crashed after 30 and 12 hours.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[faulpeltz]

Started run on 3.15, but there were no cloud tools in your build, so I
used the linux-cloud-tools from 3.16.0-76 (jus copied the hv_* daemons
over)

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

I built a 3.15 based kernel, which can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1470250/3.15/

Can you give this kernel a test?  It never had commit 89fb4cd applied,
so it did not need to be reverted.

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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Joseph Salisbury]

Thanks again for testing!  It seems like we now need to perform another
round of bisecting between 3.13 and 3.16 since reverting all the commits
mentioned in comment #279 did not resolve the bug.

So what we need to do is revert 89fb4cd before each step on the bisect.
I'll get started on building the first kernel now.  We first need to
find out if this second offending commit was introduced in 3.14 or 3.15.
I'll post a test kernel shortly.

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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@faulpeltz I confirm the timing. I was never as specific as you are now.
I already mentioned earlier that it always happens towards the end of
the backup. I would not be surprised if the crash happens during the
merge.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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