[ILUG] Snapshotting with LVM and XFS (SLES9)

[Conor Wynne]

Hi all,

I've built a system with /dev/md0 (RAID1 9GB) for home directories.
This is LVM2'ed and the VG is called home_vg and is formatted with XFS.

This is fine and dandy and mounted as /home.

I have a spare LUN (sdd1 16GB) which is going to be used for snapshots and
backups.
So I have added /dev/sdd1 to home_vg and I run the following command to
take a point in time backup:

# xfs_freeze -f /home; lvcreate -L8.4GB -s -n snappy /dev/home_vg/lvol0;
xfs_freeze -u /home

This happily creates /dev/home_vg/snappy

Next I try to mount /dev/home_vg/snappy, but I get bad superblock errors,
and thus cannot mount it.

Its the default kernel 2.6.5 from SLES9.
lvdisplay shows that I have my two volumes, one for snapshotting.
(not in front of the box so cannot give you exact output at the mo)

Any ideas lads?
-- 
Conor Wynne,
Dublin,
Irlande.