[linux-lvm] invalid snapshot with umounted fs
zkabelac at redhat.com
Tue May 12 07:32:32 UTC 2015
Dne 11.5.2015 v 11:35 Christian Hesse napsal(a):
> Hello everybody,
> I have a backup scripts that creates read-only snapshots from my lvm volumes,
> then runs rsync on them.
> This fails for one of my volumes, mount reports an unknown filesystem on the
> snapshot. The only difference compared to my other volumes is the fact that
> it is not mounted by default.
> Mounting the filesystem fixes the problem, the snapshot is valid when created
> from mounted filesystem.
> I saw this behavior with lvm2 versions 2.02.116 to 2.02.119. Probably I did
> not have this configuration before, so possibly the problem exists even
You would need to probably pass more data with your email as without metadata
archive it's quite hard to guess what is going on.
rule #1 is - when you snapshot gets overfilled - it's automatically LOST -
it's made invalid and any filesystem on it becomes unreadable.
rule #2 - configure & use dmeventd (see lvm.conf thresholds) to avoid this
situation to happen.
If you see some other bug - open BZ case (for rawhide if you can't match your
distro) and fill in all info - kernel version, LVM metadata, dmsetup status
and so on...
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