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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