# zpool replace storage 10409304506128386199 /dev/cache/gcada3p1
invalid vdev specification
use '-f' to override the following errors:
/dev/cache/gcada3p1 is part of active pool 'storage'

# zpool status
  pool: storage
 state: DEGRADED
status: One or more devices has been taken offline by the administrator.
        Sufficient replicas exist for the pool to continue functioning in a
        degraded state.
action: Online the device using 'zpool online' or replace the device with
        'zpool replace'.
  scan: resilvered 690G in 3h25m with 0 errors on Fri Mar  2 03:31:00 2012
config:

        NAME                      STATE     READ WRITE CKSUM
        storage                   DEGRADED     0     0     0
          raidz1-0                DEGRADED     0     0     1
            gpt/storage0          ONLINE       0     0     0
            10409304506128386199  OFFLINE      0     0     0  was /dev/gpt/storage1
            gpt/storage2          ONLINE       0     0     0

errors: No known data errors