After a power outage due to a thunder storm my 3 disk raidz1 pool has become
UNAVAILable.
It is a ZFV v13 pool using the whole 3 disks created on FreeBSD current 8 x64
and worked well for over a month. Unfortunately I wasn't able to import the
pool with neither a FreeBSD LiveCD or the current OpenSolaris LiveCD x86/x64.
When I tried to import the pool with FreeBSD the system just hangs (I waited
for 2 days for a response, which didn't come, not even an error message).
Browsing the web informed me that this problem might be solved by using a newer
ZFS revision. Therefore I gave opensolaris a try, resulting in the following
zpool import -f output:
pool: tank
id: 582994605255991135
state: UNAVAIL
status: The pool is formatted using an older on-disk version.
action: The pool cannot be imported due to damaged devices or data.
config:
tank UNAVAIL insufficient replicas
raidz1 UNAVAIL corrupted data
c8t0d0p0 ONLINE
c10d0p0 ONLINE
c11d0p0 ONLINE
The OpenSolaris LiveCD (snv_111b) uses ZFS v14, which would explain the status
message.
zdb -l shows full LABELs on c8t0d0p0, but the other disks are missing LABEL 2
and LABEL 3.
c8t0d0p0 is connected via usb and the other disks via onboard SATA.
Some people with similar problems where able to solve them by exporting and
importing their pools.
I can't export the pool, since I need to import it first in order to have a
pool available to export, can't destroy it import it with the -D option for the
same reason.
At least the disks themselves seem to be okay, since dd finished on all disks
without errors.
Everything I found on the web so far was either not applicable or didn't lead
to any results.
I hope that you can help me to get at least a fraction of the data back. The
'important data' was the cifs share used by all in-house computers for central
storage. There are partial backups of the data, on different disks, but those
aren't up to date with the files on the pool. Snapshots have been made, but
those are on the pool as well.
I planned on adding another disk for the OS and use the raidz for storage only.
The new disk arrived a few days after that incident with the power outage. So
I am close to just setup the whole system from scratch with the new setup, but
I want to give it a last try to recover it with your expertise. After all it
would be pretty convenient to add the raidz pool to the fresh install without
loosing any user data.
Regards, sid
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