Hi folks,
At home I run OpenSolaris x86 with a 4 drive Raid-Z (4x1TB) zpool and
it''s not in great shape. A fan stopped spinning and soon after the top
disk failed (cause you know, heat rises). Naturally, OpenSolaris and ZFS
didn''t skip a beat; I didn''t even notice it was dead until I
saw the disk activity LED stuck on nearly a week later.
So I decided I would attach the disks to 2nd system (with working fans) where I
could backup the data to tape. So here''s where I got dumb...I ran
''zpool export''. Of course, I never actually ended up
attaching the disks to another machine, but ever since that export I''ve
been unable to import the pool at all. I''ve ordered a replacement 1TB
disk, but it hasn''t arrived yet. Since I got no errors from the scrub I
ran while the array was degraded, I''m pretty confident that the
remaining 3 disks have valid data.
* Should I be able to import a degraded pool?
* If not, shouldn''t there be a warning when exporting a degraded pool?
* If replace 1TB dead disk with a blank disk, might the import work?
* Are there any tools (or commercial services) for ZFS recovery?
I read a blog post (which naturally now I can''t find) where someone in
similar circumstances was able to import his pool after restoring
/etc/zfs/zpool.cache from a backup before the ''zpool export''.
Naturally this guy was doing it with ZFS-FUSE under Linux, so it''s
another step removed, but can someone explain to me the logic & risks of
trying such a thing? Will it work if the zpool.cache comes from
1day/1week/1month old backup?
So here''s what I get...
peter at pickle:~$ pfexec zpool import
pool: andre
id: 5771661786439152324
state: FAULTED
status: One or more devices are missing from the system.
action: The pool cannot be imported. Attach the missing
devices and try again.
see: http://www.sun.com/msg/ZFS-8000-3C
config:
andre FAULTED corrupted data
raidz1 DEGRADED
c5t0d0 ONLINE
c5t1d0 ONLINE
c5t2d0 ONLINE
c5t3d0 UNAVAIL cannot open
Any constructive suggestions would be greatly appreciated.
Thanks
--Peter