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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1369976

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1369976

Title:
  [Hyper-V] Fiber Channel Disk Remote I/O error

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  System details:
  3.16.0-14-generic #20-Ubuntu SMP Sat Sep 6 23:53:03 UTC 2014 i686 i686 i686 GNU/Linux
  Ubuntu 3.16.0-14.20-generic 3.16.2
  Description:    Ubuntu Utopic Unicorn (development branch)
  Release:        14.10
  Ubuntu 140.10 32bit 11 sept daily build.

  
  Partitioning a fiber channel disk ( dev/sdc  in this example) outputs the following error:
  ​
  The partition table has been altered.
  Calling ioctl() to re-read partition table.
  /dev/sdc: close device failed: Remote I/O error

  And dmesg outputs as follows:

  [  252.811026]  sdc: sdc1
  [  252.818117] hv_storvsc vmbus_0_15: cmd 0x35 scsi status 0x0 srb status 0x4
  [  262.822050] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  262.822834] hv_storvsc vmbus_0_15: cmd 0x35 scsi status 0x0 srb status 0x4
  [  272.826196] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  272.826525] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  272.826530] hv_storvsc vmbus_0_15: cmd 0x35 scsi status 0x0 srb status 0x4
  [  282.830372] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  282.830999] hv_storvsc vmbus_0_15: cmd 0x35 scsi status 0x0 srb status 0x4
  [  292.834227] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  292.834686] hv_storvsc vmbus_0_15: cmd 0x35 scsi status 0x0 srb status 0x4
  [  302.838349] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  302.838648] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  302.838653] hv_storvsc vmbus_0_15: cmd 0x35 scsi status 0x0 srb status 0x4
  [  312.842407] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  312.842497] end_request: critical target error, dev sdc, sector 0
  [  312.850527] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  312.913987] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  312.969034] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  312.969207] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  350.280834] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  350.295070] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  350.295486] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  350.297265] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  355.886817] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  360.588873] hv_storvsc vmbus_0_15: cmd 0x35 scsi status 0x0 srb status 0x4
  [  370.590883] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  370.595090] hv_storvsc vmbus_0_15: cmd 0x35 scsi status 0x0 srb status 0x4
  [  380.598923] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  380.603236] hv_storvsc vmbus_0_15: cmd 0x35 scsi status 0x0 srb status 0x4
  [  390.607027] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  390.611269] hv_storvsc vmbus_0_15: cmd 0x35 scsi status 0x0 srb status 0x4
  [  400.615049] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  400.619307] hv_storvsc vmbus_0_15: cmd 0x35 scsi status 0x0 srb status 0x4
  [  410.623210] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  410.627399] hv_storvsc vmbus_0_15: cmd 0x35 scsi status 0x0 srb status 0x4
  [  420.631351] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4
  [  420.631464] end_request: critical target error, dev sdc, sector 0
  [  420.641937] hv_storvsc vmbus_0_15: cmd 0x35 scsi status 0x0 srb status 0x4
  [  430.643287] hv_storvsc vmbus_0_15: cmd 0x0 scsi status 0x0 srb status 0x4

  And yet I can mount, read/write on the disk ( after creating a
  filesystem ).

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