I love replacing failed hard drives. Mostly, because I hate having hard drive failures.

root@cholla ~
$ zpool attach -f tank ata-ST2000DM001-9YN164_W1E16BJB ata-ST2000DM001-1E6164_W1E5W99Y

root@cholla ~
$ zpool status -v
pool: tank
state: ONLINE
status: One or more devices is currently being resilvered. The pool will
continue to function, possibly in a degraded state.
action: Wait for the resilver to complete.
scan: resilver in progress since Fri Feb 21 08:41:52 2014
440M scanned out of 2.19T at 55.0M/s, 11h35m to go
217M resilvered, 0.02% done
config:

NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
ata-ST2000DM001-9YN164_W1E16BJB ONLINE 0 0 0
ata-ST2000DM001-1E6164_W1E5W99Y ONLINE 0 0 0 (resilvering)
mirror-1 ONLINE 0 0 0
ata-ST2000DM001-1CH164_W1E15D5G ONLINE 0 0 0
ata-ST2000DM001-1CH164_W1E16ACY ONLINE 0 0 0
logs
mirror-2 ONLINE 0 0 0
ata-OCZ-VERTEX4_OCZ-IHFPW0WRG6202CJ6-part2 ONLINE 0 0 0
ata-OCZ-VERTEX4_OCZ-8O3625YQSVR0993K-part2 ONLINE 0 0 0
cache
ata-OCZ-VERTEX4_OCZ-8O3625YQSVR0993K-part3 ONLINE 0 0 0
ata-OCZ-VERTEX4_OCZ-IHFPW0WRG6202CJ6-part3 ONLINE 0 0 0

errors: No known data errors

And there we go!