gistfile1.txt

$ zpool status
  pool: backup
 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://zfsonlinux.org/msg/ZFS-8000-2Q
  scan: scrub repaired 0 in 11h52m with 0 errors on Sun Sep 13 19:07:03 2015
config:

	NAME                                            STATE     READ WRITE CKSUM
	backup                                          DEGRADED     0     0     0
	  mirror-0                                      DEGRADED     0     0     0
	    17562333335807346214                        UNAVAIL      0     0     0  was /dev/sdc1
	    media-7572C7DE-B900-CD48-B181-5614B11491B8  ONLINE       0     0     0
	    media-0D6AA16D-3F23-DF44-B8F9-ED53CDF8483D  ONLINE       0     0     0

errors: No known data errors