# [OmniOS-discuss] Resilvering and errors in RAIDZ1 "DEGRADED"

steve at linuxsuite.org steve at linuxsuite.org
Tue Aug 9 19:53:00 UTC 2016

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    Howdy!

                I have a raidz1 pool that had a disk failure, I OFFLINE the
    failed disk and
    then did a REPLACE. Resilvering started.  I checked back a couple of hours
    later
    to see how the resilvering was coming along. I noticed that another device
    in the pool is in a "REMOVED" state. I assume it failed, as I didn't
    remove it.

              So a couple of questions.

                  i) Is the recovery of this pool destined for failure because
    it is a raidz1 and
                      there are 2 "missing" disks and the resilver hasn't
    completed?

                 ii) Why isn't this pool in a FAILED or UNAVAILABLE state?

                iii) I can still read the data from the disk, as far as I can
    tell???? Is it
                     possible to recover the data, or will I find some data
    not there??

               iv) Are the errors in the files  the result of checksum error
    but the data
                     is not recoverable...??

               I got a copy :-)

             thanx - steve

    root at omnios-test:/dfs1_data52/test# zpool status -v dfs1_data52
      pool: dfs1_data52
     state: DEGRADED
    status: One or more devices is currently being resilvered.  The pool will
            continue to function, possibly in a degraded state.
    action: Wait for the resilver to complete.
      scan: resilver in progress since Tue Aug  9 11:38:20 2016
        4.75T scanned out of 17.0T at 337M/s, 10h33m to go
        387M resilvered, 27.98% done
    config:

            NAME                         STATE     READ WRITE CKSUM
            dfs1_data52                  DEGRADED     0     0     8
              raidz1-0                   DEGRADED     0     0    16
                c2t50000C0F01C493DAd0    ONLINE       0     0     0
                c2t50014EE55558B72Ed0    ONLINE       0     0     0
                replacing-2              DEGRADED     0     0     0
                  17843744530960610892   OFFLINE      0     0     0  was
    /dev/dsk/c7t50000C0F04557AD2d0s0
                  c2t50000C0F011E16CEd0  ONLINE       0     0     0
    (resilvering)
                c2t50014EE55558A90Ed0    REMOVED      0     0     0
                c2t5000CCA03B67EE39d0    ONLINE       0     0     0

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

            /dfs1_data52/91/59/1501715991.bkt
            /dfs1_data52/92/59/1501715992.bkt

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