Are you using lvm-snapshot chroots with schroot?

If this is the case, is the snapshot device mounted in your filesystem?
If so, and the filesystem is "dirty", i.e. you are making changes to it
while you are snapshotting, or there are pending changes not yet written
to disc, then the filesystem will be in an inconsistent state in the
snapshot, and it may fail to mount.

If this is the case, the solution is to not mount the device being
snapshotted.  This way, the filesystem will always be mountable.  Note
that there is a contrib schroot setup script, 09fsck, to fsck the
snapshot before mount.  It's a workaround, but I wouldn't recommend it
unless you had no other choice.


Regards,
Roger
(Debian maintainer of sbuild and schroot)

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https://bugs.launchpad.net/bugs/723054

Title:
  Intermittently fails to recognize file system

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