** Also affects: lvm2 (Ubuntu Quantal)
Importance: Undecided
Status: New
** Description changed:
- Hi,
+ [Impact]
- pvmove can wipe the data when issue_discards is set to 1 in
- /etc/lvm/lvm.conf
+ * 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.
- This has been fixed in debian in the -5 upload.
+ [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.
** Changed in: lvm2 (Ubuntu Quantal)
Status: New => Triaged
** Changed in: lvm2 (Ubuntu Quantal)
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/1082325
Title:
pvmove wipes data when issue_discards=1 on SSD
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