pool: MainVolume
 state: DEGRADED
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://illumos.org/msg/ZFS-8000-9P
  scan: scrub repaired 0 in 8h40m with 0 errors on Fri Aug 26 10:40:36 2016
config:

        NAME                                            STATE     READ WRITE CKSUM
        MainVolume                                      DEGRADED     0     0     0
          raidz2-0                                      ONLINE       0     0     0
            gptid/938ea257-46e8-11e6-9353-047d7b163d66  ONLINE       0     0     0
            gptid/959a3986-46e8-11e6-9353-047d7b163d66  ONLINE       0     0     0
            gptid/97c7037d-46e8-11e6-9353-047d7b163d66  ONLINE       0     0     0
            gptid/99f22f79-46e8-11e6-9353-047d7b163d66  ONLINE       0     0     0
            gptid/9c1f201e-46e8-11e6-9353-047d7b163d66  ONLINE       0     0     0
            gptid/624b121f-6ae1-11e6-a8a6-047d7b163d66  ONLINE       0     0     0
          raidz2-1                                      DEGRADED     0     0     0
            gptid/5337674a-52d0-11e6-9b9b-047d7b163d66  ONLINE       0     0     0
            gptid/566f57e6-52d0-11e6-9b9b-047d7b163d66  ONLINE       0     0     0
            gptid/5993e0a5-52d0-11e6-9b9b-047d7b163d66  ONLINE       0     0     0
            gptid/7b7fbe9c-6ae2-11e6-a8a6-047d7b163d66  DEGRADED     0     0 4.53K  too many errors
            gptid/5fb1a2f4-52d0-11e6-9b9b-047d7b163d66  ONLINE       0     0     0
            gptid/b5f753ee-6a65-11e6-a8a6-047d7b163d66  ONLINE       0     0     0

errors: No known data errors

  pool: freenas-boot
 state: ONLINE
  scan: scrub repaired 0 in 0h0m with 0 errors on Wed Aug  3 03:45:08 2016
config:

        NAME        STATE     READ WRITE CKSUM
        freenas-boot  ONLINE       0     0     0
          ada0p2    ONLINE       0     0     0

errors: No known data errors