zpool status -xv
  pool: data
 state: DEGRADED
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: scrub repaired 0 in 0h34m with 16 errors on Wed Apr  5 14:50:28 2017
config:

	NAME                                          STATE     READ WRITE CKSUM
	data                                          DEGRADED     0     0    47
	  gptid/1c010f86-796b-11e6-aeb7-003048c826e0  ONLINE       0     0     0
	  gptid/1d3a03e0-796b-11e6-aeb7-003048c826e0  ONLINE       0     0     0
	  gptid/1e797e2c-796b-11e6-aeb7-003048c826e0  ONLINE       0     0     0
	  gptid/1fbc5a9f-796b-11e6-aeb7-003048c826e0  ONLINE       0     0     0
	  gptid/20c77ce4-796b-11e6-aeb7-003048c826e0  ONLINE       0     0     0
	  gptid/21b36ff3-796b-11e6-aeb7-003048c826e0  DEGRADED     0     0    94  too many errors
	logs
	  mirror-6                                    ONLINE       0     0     0
	    ada2p1                                    ONLINE       0     0     0
	    ada5p1                                    ONLINE       0     0     0
	cache
	  ada2p2                                      ONLINE       0     0     0
	  ada5p2                                      ONLINE       0     0     0

errors: Permanent errors have been detected in the following files:

        /mnt/data/ovirt-he/5cab88a1-ed58-4b1c-9824-612636c2ccc0/images/8c3f22eb-a493-4ec0-b4ca-d6ffa2eadabe/6fb8b8b9-10e9-4607-beb5-42c146314a57