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[jkampe <jkampe@xxxxxx>]

I can confirm same with old LACIE 250GB

However adding usb-storage quirks 'uw' for it _may_ work around the issue;
e.g. add (just substitute vendor and product id for yours)

options usb-storage quirks=059f:0651:uw

dmesg with above quirks / kernel  3.16.0-31-generic
[   57.952732] usb 2-4: new high-speed USB device number 3 using ehci-pci
[   58.085433] usb 2-4: New USB device found, idVendor=059f, idProduct=0651
[   58.085442] usb 2-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   58.085447] usb 2-4: Product: LaCie Hard Drive USB
[   58.085451] usb 2-4: Manufacturer: LaCie
[   58.085454] usb 2-4: SerialNumber: 10000E000CD8F66F
[   58.086821] usb-storage 2-4:1.0: USB Mass Storage device detected
[   58.088781] usb-storage 2-4:1.0: Quirks match for vid 059f pid 0651: 800200
[   58.088857] scsi11 : usb-storage 2-4:1.0
[   59.088892] scsi 11:0:0:0: Direct-Access     SEAGATE  ST3250820A       3.AA PQ: 0 ANSI: 2
[   59.089927] sd 11:0:0:0: Attached scsi generic sg5 type 0
[   59.090800] sd 11:0:0:0: [sdf] 488397168 512-byte logical blocks: (250 GB/232 GiB)
[   59.090805] sd 11:0:0:0: [sdf] Assuming Write Enabled
[   59.090808] sd 11:0:0:0: [sdf] Assuming drive cache: write through
[   59.110410]  sdf: sdf1
[   59.112295] sd 11:0:0:0: [sdf] Attached SCSI disk

relevant dmesg _without_ quirks;
[12768.255738] usb 2-4: new high-speed USB device number 3 using ehci-pci
[12768.388658] usb 2-4: New USB device found, idVendor=059f, idProduct=0651
[12768.388667] usb 2-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[12768.388672] usb 2-4: Product: LaCie Hard Drive USB
[12768.388676] usb 2-4: Manufacturer: LaCie
[12768.388679] usb 2-4: SerialNumber: 10000E000CD8F66F
[12768.389259] usb-storage 2-4:1.0: USB Mass Storage device detected
[12768.389422] usb-storage 2-4:1.0: Quirks match for vid 059f pid 0651: 908420
[12768.389475] scsi11 : usb-storage 2-4:1.0
[12769.387735] scsi 11:0:0:0: Direct-Access     SEAGATE  ST3250820A       3.AA PQ: 0 ANSI: 2
[12769.388477] sd 11:0:0:0: Attached scsi generic sg5 type 0
[12769.389527] sd 11:0:0:0: [sdf] 488397168 512-byte logical blocks: (250 GB/232 GiB)
[12769.395049] sd 11:0:0:0: [sdf] Write Protect is off
[12769.395056] sd 11:0:0:0: [sdf] Mode Sense: 53 00 00 08
[12769.397128] sd 11:0:0:0: [sdf] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[12769.423794]  sdf: sdf1
[12769.427236] sd 11:0:0:0: [sdf] Attached SCSI disk

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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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