Hi Doug,

The "vms" pool was created in a non-redundant way, so there is no way to get the data off of it unless you can put back the original c0t3d0 disk.

If you can still plug in the disk, you can always do a zpool replace on it afterwards.

If not, you'll need to restore from backup, preferably to a pool with raidz or mirroring so zfs can repair faults automatically.


On Mon, 15 Aug 2011, Doug Schwabauer wrote:

Help - I've got a bad disk in a zpool and need to replace it.  I've got an 
extra drive that's not being used, although it's still marked like it's in a 
pool. 
So I need to get the "xvm" pool destroyed, c0t5d0 marked as available, and 
replace c0t3d0 with c0t5d0.

root@kc-x4450a # zpool status -xv
  pool: vms
 state: UNAVAIL
status: One or more devices are faulted in response to IO failures.
action: Make sure the affected devices are connected, then run 'zpool clear'.
   see: http://www.sun.com/msg/ZFS-8000-HC
 scrub: none requested
config:

        NAME        STATE     READ WRITE CKSUM
        vms         UNAVAIL      0     3     0  insufficient replicas
          c0t2d0    ONLINE       0     0     0
          c0t3d0    UNAVAIL      0     6     0  experienced I/O failures
          c0t4d0    ONLINE       0     0     0

errors: Permanent errors have been detected in the following files:

        vms:<0x5>
        vms:<0xb>
root@kc-x4450a # zpool replace -f vms c0t3d0 c0t5d0
cannot replace c0t3d0 with c0t5d0: pool I/O is currently suspended
root@kc-x4450a # zpool import
  pool: xvm
    id: 14176680653869308477
 state: DEGRADED
status: The pool was last accessed by another system.
action: The pool can be imported despite missing or damaged devices.  The
        fault tolerance of the pool may be compromised if imported.
   see: http://www.sun.com/msg/ZFS-8000-EY
config:

        xvm         DEGRADED
          mirror-0  DEGRADED
            c0t4d0  FAULTED  corrupted data
            c0t5d0  ONLINE

Thanks!

-Doug



Regards,
markm
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