Alert: Status is UNKNOWN

[xtx]

Hardware:
CPU: AMD Phenom(tm) II X6 1045T Processor
Mobo: ASUS M5A97 LE R2.0
Memory: 8 gigs

6 hard drives, 2 TB each, in a Raidz

I have been receiving this message about once a day:

Code:

WARNING: The volume RAID (ZFS) status is UNKNOWN: One or more devices has experienced an unrecoverable error. An attempt was made to correct the error. Applications are unaffected.Determine if the device needs to be replaced, and clear the errors using 'zpool clear' or replace the device with 'zpool replace'.

Output of "zpool status RAID"

Code:

pool: RAID
 state: ONLINE
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://www.sun.com/msg/ZFS-8000-9P
  scan: none requested
config:

        NAME                                            STATE     READ WRITE CKSUM
        RAID                                            ONLINE       0     0     0
          raidz1-0                                      ONLINE       0     0     0
            gptid/9e6f0592-8274-11e2-8cf6-50465d54c717  ONLINE       0     0     0
            gptid/9ef208c9-8274-11e2-8cf6-50465d54c717  ONLINE       0     0     0
            gptid/9f7baaba-8274-11e2-8cf6-50465d54c717  ONLINE       0     0     0
            gptid/a0072a49-8274-11e2-8cf6-50465d54c717  ONLINE       0     0     0
            gptid/a08dc51c-8274-11e2-8cf6-50465d54c717  ONLINE       0     0     0
            gptid/a111639a-8274-11e2-8cf6-50465d54c717  ONLINE       3  175K     0

errors: No known data errors

Why is this message occurring if all 6 harddrives are online and it literally says "no known data errors"?
After a reboot everything looks fine for awhile and then it comes back

 

[cyberjock]

It's occurring because you have a drive that has significant problems. Your redundancy from the RAIDZ1 is why you have "No known data errors". If you look at the top it says "One or more devices has experienced an unrecoverable error. An attempt was made to correct the error. Applications are unaffected."which means if you didn't have redundancy you'd have lost data right now.

If you look at gptid/a111639a-8274-11e2-8cf6-50465d54c717 you have 3 read errors and 175,000 write errors. I'd check that drive out with a SMART test. Otherwise, I'd get another disk and replace the one you have. You should do this sooner than later because if anything goes wrong on another disk(even as simple as 1 bad sector) you will almost certainly lose data. If you had done a RAIDZ2 then you'd still have a second disk of redundancy and be at less risk for losing data from 1 failing disk.

 

[xtx]

Thanks for the quick response, I'll replace the drive right away