zfs discuss - Aug 2011 - zpool replace

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


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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 at 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 at kc-x4450a # zpool replace -f vms c0t3d0 c0t5d0
> cannot replace c0t3d0 with c0t5d0: pool I/O is currently suspended
> root at 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