Bryan - ZFS Error

Allan,

First - sorry for misspelling your name! As a guy with a weirdly
spelled name (brYan) I normally pay way more attention than that!

That said, my FreeNAS is reporting an odd error. It's odd to me
because of my newness to ZFS but I'm hoping you can help me out. It
seems like I have data corruption in two "files" that I can't actually
find on the disk. Here's the output from zpool status -v. Any
thoughts?

# zpool status -v
  pool: freenas-boot
 state: ONLINE
  scan: scrub repaired 0 in 0h0m with 0 errors on Tue Jan  3 03:45:09 2017
config:

NAME        STATE     READ WRITE CKSUM
freenas-boot  ONLINE       0     0     0
  mirror-0  ONLINE       0     0     0
    ada4p2  ONLINE       0     0     0
    ada5p2  ONLINE       0     0     0

errors: No known data errors

  pool: tank0
 state: ONLINE
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 8K in 5h28m with 3 errors on Sun Jan  1 07:28:44 2017
config:

NAME                                                STATE     READ WRITE CKSUM
tank0                                               ONLINE       0     0     3
  mirror-0                                          ONLINE       0     0     4
    gptid/4ba27fa4-93db-11e6-b57b-0cc47aad2354.eli  ONLINE       0     0     4
    gptid/4c68e324-93db-11e6-b57b-0cc47aad2354.eli  ONLINE       0     0     4
  mirror-1                                          ONLINE       0     0     3
    gptid/4d5b526c-93db-11e6-b57b-0cc47aad2354.eli  ONLINE       0     0     3
    gptid/4e2ec795-93db-11e6-b57b-0cc47aad2354.eli  ONLINE       0     0     3

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

        tank0/.system/cores@auto-20170106.1037-2w:<0xb94f50>
        tank0/.system/cores@auto-20170106.1037-2w:<0xb0a2d3>
#

Thanks,
Bryan