I was attempting to
implement a quick snapshot backup solution using lvm2, XFS, and
snapshots on a 2.6 kernel. After some very odd hangs I started hunting
around in the lists and came across some posts that snapshots were not
yet properly implemented in 2.6. These were from a few months ago and
a quick scan of the lvm2 tarball (in particular WHATS_NEW and README)
doesn't seem to indicate that snaphots should be avoided. So the
question is, are snapshots usable? And if they aren't where would I
find more current information about when they will be? as it stands
now creating a snapshot tends to produce:
disk1 snapshots # lvcreate -L5G -nsnaptest -s /dev/filestore/archive
device-mapper ioctl cmd 9 failed: Invalid argument
Couldn't load device 'filestore-snaptest'.
Problem reactivating origin archive
an lvscan afterwards shows the snapshot:
disk1 snapshots # lvscan
ACTIVE Original '/dev/filestore/archive' [60.00 GB] next free
(default)
ACTIVE '/dev/filestore/groups' [50.00 GB] next free
(default)
ACTIVE '/dev/filestore/personal' [50.00 GB] next free
(default)
ACTIVE Snapshot '/dev/filestore/snaptest' [5.00 GB] next free
(default)
but the device isn't actually created and it takes hard rebooting and a
lot of fiddling and poking to delete it. Any help or insight is
appreciated.
-David
