Hi,

I awoke this morning to a panic'd opensolaris zfs box. I rebooted it
and confirmed it would panic each time it tried to import the 'tank'
pool. Once I disconnected half of one of the mirrored disks, the box
booted cleanly and the pool imported without a panic.

Because this box has a hot spare, it began resilvering automatically.
This is the first time I've resilvered to a hot spare, so I'm not sure
whether the output below [1]  is normal.

In particular, I think it's odd that the spare has an equal number of
read and cksum errors. Is this normal? Is my spare a piece of junk,
just like the disk it replaced?


[1]
r...@weyl:~# zpool status tank
  pool: tank
 state: DEGRADED
status: One or more devices could not be opened.  Sufficient replicas exist for
        the pool to continue functioning in a degraded state.
action: Attach the missing device and online it using 'zpool online'.
   see: http://www.sun.com/msg/ZFS-8000-2Q
 scrub: resilver in progress for 3h42m, 97.34% done, 0h6m to go
config:

        NAME                       STATE     READ WRITE CKSUM
        tank                       DEGRADED     0     0     0
          mirror                   DEGRADED     0     0     0
            spare                  DEGRADED 1.36M     0     0
              9828443264686839751  UNAVAIL      0     0     0  was
/dev/dsk/c6t1d0s0
              c7t1d0               DEGRADED     0     0 1.36M  too many errors
            c9t0d0                 ONLINE       0     0     0
          mirror                   ONLINE       0     0     0
            c7t0d0                 ONLINE       0     0     0
            c5t1d0                 ONLINE       0     0     0
        spares
          c7t1d0                   INUSE     currently in use

errors: No known data errors
r...@weyl:~#
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