[ZFS] cannot detach /dev/gpt/system-disk-60: no valid replicas

[Vladislav Prodan]

root at mfsbsd:~ # zpool status
  pool: tank
 state: ONLINE
status: One or more devices has experienced an error resulting in data
        corruption.  Applications may be affected.
action: Restore the file in question if possible.  Otherwise restore the
        entire pool from backup.
   see: http://illumos.org/msg/ZFS-8000-8A
  scan: resilvered 48.8G in 7h19m with 3 errors on Fri Nov 15 18:43:18 2013
config:

        NAME                    STATE     READ WRITE CKSUM
        tank                    ONLINE       0     0     0
          mirror-0              ONLINE       0     0     0
            gpt/system-disk-60  ONLINE       0     0     0
            gpt/disk-90         ONLINE       0     0     0

errors: 3 data errors, use '-v' for a list
root at mfsbsd:~ # zpool detach tank /dev/gpt/system-disk-60
cannot detach /dev/gpt/system-disk-60: no valid replicas


Checking zfs scrub has given nothing.
How do I remove the disk gpt/system-disk-60 from the pool zpool without destroying it?

-- 
Vladislav V. Prodan            
System & Network Administrator 
http://support.od.ua           
+380 67 4584408, +380 99 4060508
VVP88-RIPE