In Mac ZFS 74.1, I have physically detached half of my mirror. However,
disk1s2 is still being reported to be attached, but accumulating errors:
% zpool status
pool: datapool
state: ONLINE
status: One or more devices has experienced an unrecoverable error. An
attempt was made to correct the error. Applications are unaffected.
action: Determine if the device needs to be replaced, and clear the errors
using 'zpool clear' or replace the device with 'zpool replace'.
see:
http://www.sun.com/msg/ZFS-8000-9P
scrub: scrub completed with 0 errors on Sun Aug 4 04:48:17 2013
config:
NAME STATE READ WRITE CKSUM
datapool ONLINE 0 0 0
mirror ONLINE 0 0 0
disk0s2 ONLINE 0 0 0
disk1s2 ONLINE 316K 7.71M 0
errors: No known data errors