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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

I'm trying to reproduce this issue to gather addition data.  Can folks
affected by this bug attach the section of syslog that is generated
after attaching the external USB drive.

Specifically, I'm looking to see if the Write cache is enabled or
disabled.

For example, my syslog shows the cache is disabled:

sd 6:0:0:0: [sdc] Write cache: disabled, read cache: enabled, doesn't
support DPO or FUA


I see that the original bug reporter shows that the write cache is enable, so I'm wondering if that is required to reproduce this:
Sep 7 15:07:10 nux kernel: [261449.208280] sd 20:0:0:0: [sdi] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA

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https://bugs.launchpad.net/bugs/1366538

Title:
  Synchronisation/close /dev/sdX: i/o error on target host

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged

Bug description:
  Ubuntu 14.04.1 x86-64
  wanting to unmout a pata drive (usb attached), I get this (title) "Warning from libparted" when gparted launches.
  Same issue with another pc x86-64
  Errors retries then ignore, shred /dev/sdi fails:

  shred: /dev/sdi : pass 1/2 (random)…
  shred: /dev/sdi : pass 1/2 (random)…231MiB/94GiB 0 %
  shred: /dev/sdi : failure of fdatasync: i/o error on target host

  I reached to shred the drive from a 12.04.4 i386 pc with no error.

  Sep  7 15:07:08 nux kernel: [261448.072475] usb 5-1: new high-speed USB device number 10 using xhci_hcd
  Sep  7 15:07:09 nux kernel: [261448.202999] usb 5-1: New USB device found, idVendor=04cf, idProduct=8818
  Sep  7 15:07:09 nux kernel: [261448.203008] usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
  Sep  7 15:07:09 nux kernel: [261448.203013] usb 5-1: Product: USB Mass Storage Device
  Sep  7 15:07:09 nux kernel: [261448.203018] usb 5-1: Manufacturer: Myson Century, Inc.
  Sep  7 15:07:09 nux kernel: [261448.205463] usb-storage 5-1:1.0: USB Mass Storage device detected
  Sep  7 15:07:09 nux kernel: [261448.205673] scsi20 : usb-storage 5-1:1.0
  Sep  7 15:07:10 nux kernel: [261449.206849] scsi 20:0:0:0: Direct-Access     HTS72101 0G9AT00          MCZO PQ: 0 ANSI: 0 CCS
  Sep  7 15:07:10 nux kernel: [261449.207763] sd 20:0:0:0: Attached scsi generic sg7 type 0
  Sep  7 15:07:10 nux kernel: [261449.207901] sd 20:0:0:0: [sdi] 195371568 512-byte logical blocks: (100 GB/93.1 GiB)
  Sep  7 15:07:10 nux kernel: [261449.208068] sd 20:0:0:0: [sdi] Write Protect is off
  Sep  7 15:07:10 nux kernel: [261449.208074] sd 20:0:0:0: [sdi] Mode Sense: 00 14 00 00
  Sep  7 15:07:10 nux kernel: [261449.208280] sd 20:0:0:0: [sdi] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
  Sep  7 15:07:10 nux kernel: [261449.555232]  sdi: unknown partition table
  Sep  7 15:07:10 nux kernel: [261449.555926] sd 20:0:0:0: [sdi] Attached SCSI disk
  Sep  7 15:07:43 nux kernel: [261482.219026] end_request: critical target error, dev sdi, sector 0
  Sep  7 15:07:52 nux kernel: [261492.015180] end_request: critical target error, dev sdi, sector 0
  Sep  7 15:07:55 nux kernel: [261494.261159] end_request: critical target error, dev sdi, sector 0
  Sep  7 15:16:23 nux kernel: [262003.027005] end_request: critical target error, dev sdi, sector 0
  Sep  7 15:16:35 nux kernel: [262014.215352] end_request: critical target error, dev sdi, sector 0
  Sep  7 15:16:35 nux kernel: [262014.859651] end_request: critical target error, dev sdi, sector 0

  [EDIT:
  Once shreded, no error on the i386, but still same error on the 2 x86-64]

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