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[Rolf Leggewie <1082325@xxxxxxxxxxxxxxxxxx>]

quantal has seen the end of its life and is no longer receiving any
updates. Marking the quantal task for this ticket as "Won't Fix".

** Changed in: lvm2 (Ubuntu Quantal)
       Status: Triaged => Won't Fix

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https://bugs.launchpad.net/bugs/1082325

Title:
  pvmove wipes data when issue_discards=1 on SSD

Status in lvm2 - Logical Volume Manager:
  Unknown
Status in lvm2 package in Ubuntu:
  Fix Released
Status in lvm2 source package in Quantal:
  Won't Fix
Status in lvm2 package in Debian:
  Fix Released

Bug description:
  [Impact]

   * Setting issue_discards=1 in /etc/lvm.conf (non-default) results in data loss, if pvmove is performed
  on a Logical Volume which is moved to or form an SSD or other block devices which supports discards
   * As this bug *directly cause a loss of user data* this fix should be uploaded to quantal (lvm2 in precise is not effected, because it does not support the issue_discards option.

  [Test Case]

   * Enable issue_discards=1 in /etc/lvm.conf
   * Create a volumegroup with two physical volumes (at least one of these must support discards (e.g. an SSD)
   * Create a test logical volume
   * Create a filesystem on this logical volume
   * With pvmove, move the underlying logical volume to the other physical volume
  => experience Data loss (in my experiments the whole logical volume was zeroed, checked with hexdumd /dev/vgtest/lvtest)

  [Regression Potential]

   * The upstream fix is fairly self contained and separates discard and
  move operations.

  The patches can be found at:

  https://lists.fedorahosted.org/pipermail/lvm2-commits/2012-June/000037.html
  https://lists.fedorahosted.org/pipermail/lvm2-commits/2012-June/000038.html
  https://lists.fedorahosted.org/pipermail/lvm2-commits/2012-June/000039.html

  An SRU of just the upstream-*.patches from the -5 upload fix this bug.

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