Hi,
I've been playing around with zfs for a few days now, and now ended up with a
faulted raidz (4 disks) with 3 disks still marked as online.
Lets start with the output of zpool import:
pool: tank-1
id: 15108774693087697468
state: FAULTED
status: One or more devices contains corrupted data.
action: The pool cannot be imported due to damaged devices or data.
The pool may be active on another system, but can be imported using
the '-f' flag.
see: http://www.sun.com/msg/ZFS-8000-5E
config:
tank-1 FAULTED corrupted data
raidz1-0 ONLINE
disk/by-id/dm-name-tank-1-1 UNAVAIL corrupted data
disk/by-id/dm-name-tank-1-2 ONLINE
disk/by-id/dm-name-tank-1-3 ONLINE
disk/by-id/dm-name-tank-1-4 ONLINE
After some google searches and reading http://www.sun.com/msg/ZFS-8000-5E,
it seems to me as if some metadata is lost, and thus the pool cannot be
restored anymore.
I've tried "zpool import -F tank-1" as well as "zpool import -f tank-1", both
resulting in the following message:
cannot import 'tank-1': I/O error
Destroy and re-create the pool from
a backup source.
What I'm wondering about right now are the following things:
Is there some way to recover the data? I thought raidz would require two disks
to lose the data?
And as I think that the data is lost - why did this happen in the first place?
Which situation can cause a faulted raidz that has only one broken drive?
Greetings,
Christian
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