root@freenas[~]# zpool status -v storage1
  pool: storage1
 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 in progress since Wed May 12 16:29:23 2021
        1.96T scanned at 228M/s, 1.23T issued at 143M/s, 2.44T total
        0 repaired, 50.30% done, 0 days 02:28:21 to go
config:

        NAME                                            STATE     READ WRITE CKSUM
        storage1                                        DEGRADED    82     0    41
          mirror-0                                      DEGRADED   164     0    82
            gptid/09a22038-b181-11eb-91aa-d0509995e5e8  ONLINE       0     0   246
            replacing-1                                 UNAVAIL      0     0     0
              3277436566342500683                       UNAVAIL      0     0     0  was /dev/gptid/75ad4e67-d9a9-11ea-89ea-d0509995e5e8
              11717172721757350352                      UNAVAIL      0     0     0  was /dev/gptid/6acd5b98-b1ce-11eb-95d4-d0509995e5e8

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

        <metadata>:<0xc0>
        <metadata>:<0xdf>
        <metadata>:<0xf0>