Public bug reported:

Problem Description
=============================
Two deivce created when creating 1 partition on a mpath device:

% sudo parted /dev/mapper/mpath2
GNU Parted 2.3
Using /dev/mapper/mpath2
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p
Model: Linux device-mapper (multipath) (dm)
Disk /dev/mapper/mpath2: 284GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos

Number  Start  End  Size  Type  File system  Flags

(parted) mkpart
mkpart    mkpartfs
(parted) mkpart
Partition type?  primary/extended? primary
File system type?  [ext2]?
Start? 0%
End? 10%
Device /dev/mapper/mpath2p1 not found
device-mapper: table ioctl on  failed: No such device or address
Device /dev/mapper/mpath2p1 not found
device-mapper: table ioctl on  failed: No such device or address
(parted) p
Model: Linux device-mapper (multipath) (dm)
Disk /dev/mapper/mpath2: 284GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  28.4GB  28.4GB  primary

(parted) q
Information: You may need to update /etc/fstab.

% ls /dev/mapper/mpath2*
/dev/mapper/mpath2  /dev/mapper/mpath2p1  /dev/mapper/mpath2-part1
% 

Steps to Reproduce
===================================
1. install ubuntu 14.04.3 on a system which has mpath device
2. try to partition the mpath device, add one partition
 
---uname output---
Linux dilllp1 3.19.0-22-generic #22~14.04.1-Ubuntu SMP Wed Jun 17 10:03:39 UTC 
2015 ppc64le ppc64le ppc64le GNU/Linux

Userspace tool common name: parted 
Userspace rpm: parted, version: 2.3-19ubuntu1 
The userspace tool has the following bit modes: 64-bit 

== Comment: #2 - David Heller <helle...@us.ibm.com> - 2015-07-09 20:16:11 ==
Hi Ping,

Are you sure that /dev/mapper/mpath2p1 device was not left over from
install, and perhaps existed before you did the parted?  Remember there
were some changes to multipath in the installer, and the installer now
uses mpathXpX, and the running os uses mpathX-partX.. I think that is
right?

If the two devices truly were created in the same parted operation, if
you can reproduce it, can you run "udevadm monitor -p" during the
operation, and provide the output?  thx.

== Comment: #3 - Ping Tian Han <pt...@cn.ibm.com> - 2015-07-09 22:03:53 ==
(In reply to comment #2)
> Hi Ping,
> 
> Are you sure that /dev/mapper/mpath2p1 device was not left over from
> install, and perhaps existed before you did the parted?  Remember there were
Yes, I'm pretty sure the device wasn't left over from install:

% ls /dev/mapper/mpath4*
/dev/mapper/mpath4
% sudo parted /dev/mapper/mpath4*
GNU Parted 2.3
Using /dev/mapper/mpath4
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p                                                                
Error: /dev/mapper/mpath4: unrecognised disk label                        
(parted) mklabel msdos                                                    
(parted) p                                                                
Model: Linux device-mapper (multipath) (dm)
Disk /dev/mapper/mpath4: 284GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos

Number  Start  End  Size  Type  File system  Flags

(parted) mkpart 1                                                         
parted: invalid token: 1
Partition type?  primary/extended? primary                                
File system type?  [ext2]?                                                
Start? 0%                                                                 
End? 10%                                                                  
Device /dev/mapper/mpath4p1 not found
device-mapper: table ioctl on  failed: No such device or address
Device /dev/mapper/mpath4p1 not found
device-mapper: table ioctl on  failed: No such device or address
(parted) p                                                                
Model: Linux device-mapper (multipath) (dm)
Disk /dev/mapper/mpath4: 284GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  28.4GB  28.4GB  primary

(parted) q                                                                
Information: You may need to update /etc/fstab.                           

% ls /dev/mapper/mpath4*         
/dev/mapper/mpath4  /dev/mapper/mpath4p1  /dev/mapper/mpath4-part1
% 
> some changes to multipath in the installer, and the installer now uses
> mpathXpX, and the running os uses mpathX-partX.. I think that is right?  
> 
> If the two devices truly were created in the same parted operation, if you
> can reproduce it, can you run "udevadm monitor -p" during the operation, and
> provide the output?  thx.
No problem, I'll upload the result.

== Comment: #5 - Ping Tian Han <pt...@cn.ibm.com> - 2015-07-09 22:09:59 ==
(In reply to comment #4)
> Created attachment 100079 [details]
> udevadm monitor -p outputs when bug reproduced

This is the outputs when creating mpath4-part2.

== Comment: #6 - Vaishnavi Bhat <vaish...@in.ibm.com> - 2015-07-10 11:08:42 ==
Hi Ping Tian Han,

Can you please try to install the latest parted package from
http://ftp.gnu.org/gnu/parted/ and check if the issue is reproduced ?

Thank you.

== Comment: #7 - Ping Tian Han <pt...@cn.ibm.com> - 2015-07-12 22:05:17 ==
(In reply to comment #6)
> Hi Ping Tian Han,
> 
> Can you please try to install the latest parted package from
> http://ftp.gnu.org/gnu/parted/ and check if the issue is reproduced ? 
> 
> Thank you.

The latest 3.2 version doesn't have this problem on dilllp1.

** Affects: ubuntu
     Importance: Undecided
         Status: New


** Tags: architecture-ppc64le bugnameltc-127443 severity-high 
targetmilestone-inin14043

** Tags added: architecture-ppc64le bugnameltc-127443 severity-high
targetmilestone-inin14043

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1473903

Title:
  ISST-LTE: parted will generate two devices when adding one partition
  on mpath device

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+bug/1473903/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

Reply via email to