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[Gergo Debreczeni <gdebreczeni@xxxxxxxxxxxxxxxxxxxxxx>]

Public bug reported:

System details:
Linux version 3.19.0-11-generic (apw@gloin) (gcc version 4.9.2 (Ubuntu 4.9.2-10ubuntu12) ) #11~lp1423343v201503311833 SMP Tue Mar 31 17:40:01 UTC 2015 (Ubuntu 3.19.0-11.11~lp1423343v201503311833-generic 3.19.3)

Ubuntu 3.19.0-11
Ubuntu Vivid 15.04 64bit custom kernel
Platform: WS2012R2

Using a fiber channel disk partition ( dev/sde1 in this example) outputs the following error:
​
[ 1307.744496] blk_update_request: critical target error, dev sde, sector 0
[ 1396.052488] blk_update_request: critical target error, dev sde, sector 0
[ 1456.216570] blk_update_request: critical target error, dev sde, sector 0

Creating a partition works, reading too, but first time writing it hangs
for around 20 seconds and after a couple more writes the partition goes
into read-only mode:

#echo "test1" > test1.txt
*hangs for 30 seconds*
blk_update_request: critical target error, dev sde, sector 0
# echo "test2" > test2.txt
blk_update_request: critical target error, dev sde, sector 289671192
Aborting journal on device sde1-8.
EXT4-fs error (device sde1): ext4_journal_check_start:56: Detected aborted journal
EXT4-fs (sde1): Remounting filesystem read-only
# echo "test string" > sample.txt
-bash: sample.txt: Read-only file system


Dmesg log:
[  461.284362] blk_update_request: critical target error, dev sde, sector 0
[  484.845659] EXT4-fs (sde1): mounted filesystem with ordered data mode. Opts: (null)
[  548.988377] blk_update_request: critical target error, dev sde, sector 0
[  609.216340] blk_update_request: critical target error, dev sde, sector 289671192
[  609.221812] Aborting journal on device sde1-8.
[  612.237503] EXT4-fs error (device sde1): ext4_journal_check_start:56: Detected aborted journal
[  612.249529] EXT4-fs (sde1): Remounting filesystem read-only

Additional info:

cat /proc/version_signature
Ubuntu 3.19.0-11.11~lp1423343v201503311833-generic 3.19.3

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: hyper-v

** Attachment added: "lspci-vnvn.log"
   https://bugs.launchpad.net/bugs/1439780/+attachment/4364433/+files/lspci-vnvn.log

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https://bugs.launchpad.net/bugs/1439780

Title:
  [Hyper-V] Fiber Channel critical target error

Status in linux package in Ubuntu:
  New

Bug description:
  System details:
  Linux version 3.19.0-11-generic (apw@gloin) (gcc version 4.9.2 (Ubuntu 4.9.2-10ubuntu12) ) #11~lp1423343v201503311833 SMP Tue Mar 31 17:40:01 UTC 2015 (Ubuntu 3.19.0-11.11~lp1423343v201503311833-generic 3.19.3)

  Ubuntu 3.19.0-11
  Ubuntu Vivid 15.04 64bit custom kernel
  Platform: WS2012R2

  Using a fiber channel disk partition ( dev/sde1 in this example) outputs the following error:
  ​
  [ 1307.744496] blk_update_request: critical target error, dev sde, sector 0
  [ 1396.052488] blk_update_request: critical target error, dev sde, sector 0
  [ 1456.216570] blk_update_request: critical target error, dev sde, sector 0

  Creating a partition works, reading too, but first time writing it
  hangs for around 20 seconds and after a couple more writes the
  partition goes into read-only mode:

  #echo "test1" > test1.txt
  *hangs for 30 seconds*
  blk_update_request: critical target error, dev sde, sector 0
  # echo "test2" > test2.txt
  blk_update_request: critical target error, dev sde, sector 289671192
  Aborting journal on device sde1-8.
  EXT4-fs error (device sde1): ext4_journal_check_start:56: Detected aborted journal
  EXT4-fs (sde1): Remounting filesystem read-only
  # echo "test string" > sample.txt
  -bash: sample.txt: Read-only file system

  
  Dmesg log:
  [  461.284362] blk_update_request: critical target error, dev sde, sector 0
  [  484.845659] EXT4-fs (sde1): mounted filesystem with ordered data mode. Opts: (null)
  [  548.988377] blk_update_request: critical target error, dev sde, sector 0
  [  609.216340] blk_update_request: critical target error, dev sde, sector 289671192
  [  609.221812] Aborting journal on device sde1-8.
  [  612.237503] EXT4-fs error (device sde1): ext4_journal_check_start:56: Detected aborted journal
  [  612.249529] EXT4-fs (sde1): Remounting filesystem read-only

  Additional info:

  cat /proc/version_signature
  Ubuntu 3.19.0-11.11~lp1423343v201503311833-generic 3.19.3

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