@Mike/Robie:
Actually the "uas: Always apply US_FL_NO_ATA_1X quirk to Seagate
devices" patch to the kernel is (part of) the cause of the current
smartmontool failure rather than a fix for it.
The underlying problem is that most Seagate drive enclosures do not
properly handle SAT (= "ATA pass-through") when in UAS mode, and so the
kernel now (after that patch) disables SAT for all Seagate enclosures
when UAS is in use.
That change allows those enclosures to work okay in UAS mode for normal
data access (with the associated increase in performance) ... but since
Smartmontools and other utilities (e.g. "hdparm") require SAT to work,
the change breaks their functionality for those devices.
The current workaround is to use the kernel quirks to disable UAS for a
particular device, so that the kernel falls back to the old usb-storage
mode instead; this lets SAT work again (and thus Smartmontools, etc.
function properly), but only at the expense of losing UAS performance
for normal data access.
So in the long run it would be ideal for the kernel to have some way to
more dynamically deal with these sorts of buggy devices (i.e. switching
modes temporarily to allow SAT to work for special operations such as
Smartmontools but use UAT most of the time)... but I haven't run across
any discussion about such a patch anywhere, so it seems like people with
these devices will be stuck with having to choose between SAT or UAS for
the time being.
Anyway, there's now a Smartmontools Wiki page devoted to this specific
topic: https://www.smartmontools.org/wiki/SAT-with-UAS-Linux .
** Summary changed:
- Smart data works on kernel 4.13 but not on 4.15
+ for Seagate USB drive enclosures, SAT (e.g. smartmontools) works on kernel
4.13 but not on 4.15
--
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https://bugs.launchpad.net/bugs/1810215
Title:
for Seagate USB drive enclosures, SAT (e.g. smartmontools) works on
kernel 4.13 but not on 4.15
Status in linux package in Ubuntu:
Confirmed
Bug description:
smartctl -d sat -i /dev/sda work on 16.04 kernel 4.13 but on 4.15.
Here is data from 16.04
root@server:~# uname -a
Linux server 4.13.0-45-generic #50~16.04.1-Ubuntu SMP Wed May 30 11:18:27 UTC
2018 x86_64 x86_64 x86_64 GNU/Linux
root@server:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.5 LTS
Release: 16.04
Codename: xenial
root@server:~# smartctl -d sat -i /dev/sda
smartctl 6.5 2016-01-24 r4214 [x86_64-linux-4.13.0-45-generic] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Device Model: ST8000DM004-2CX188
Serial Number:ZCT07YN6
LU WWN Device Id: 5 000c50 0b1f2a4d2
Firmware Version: 0001
User Capacity:8,001,563,222,016 bytes [8.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate:5425 rpm
Form Factor: 3.5 inches
Device is:Not in smartctl database [for details use: -P showall]
ATA Version is: ACS-3 T13/2161-D revision 5
SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:Tue Jan 1 16:57:48 2019 EST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
root@server:~#
here is data from 18.04:root@mike-desktop:/tmp# uname -a
Linux mike-desktop 4.15.0-36-generic #39-Ubuntu SMP Mon Sep 24 16:19:09 UTC
2018 x86_64 x86_64 x86_64 GNU/Linux
root@mike-desktop:/tmp# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.1 LTS
Release: 18.04
Codename: bionic
root@mike-desktop:/tmp# smartctl -d sat -i /dev/sdd
smartctl 6.6 2016-05-31 r4324 [x86_64-linux-4.15.0-36-generic] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
Read Device Identity failed: scsi error unsupported field in scsi
command
A mandatory SMART command failed: exiting. To continue, add one or
more '-T permissive' options.
dmesg on 18.04 showing drive is connected /dev/sdd:
[6041017.984544] usb 3-2.4: new SuperSpeed USB device number 6 using xhci_hcd
[6041018.009417] usb 3-2.4: New USB device found, idVendor=0bc2,
idProduct=331a
[6041018.009424] usb 3-2.4: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[6041018.009428] usb 3-2.4: Product: Expansion Desk
[6041018.009432] usb 3-2.4: Manufacturer: Seagate
[6041018.009435] usb 3-2.4: SerialNumber: NAAA7HWG
[6041018.015808] scsi host5: uas
[6041018.016527] scsi 5:0:0:0: Direct-Access Seagate Expansion Desk
0915 PQ: 0 ANSI: 6
[6041018.017645] sd 5:0:0:0: Attached scsi generic sg3 type 0
[6041030.357108] sd 5:0:0:0: [sdd] 15628053167 512-byte logical blocks: (8.00
TB/7.28 TiB)
[6041030.357112] sd 5:0:0:0: [sdd] 4096-byte physical blocks
[6041030.357265] sd
