Zpool Status Error – Next Steps for Troubleshooting

truenaszfszpool

On our FreeNAS server, zpool status gives me:

  pool: raid2
 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
 scrub: none requested
config:

    NAME                                            STATE     READ WRITE CKSUM
    raid2                                           ONLINE       0     0     0
      raidz1                                        ONLINE       0     0     0
        gptid/5f3c0517-3ff2-11e2-9437-f46d049aaeca  ONLINE       0     0     0
        gptid/5fe33556-3ff2-11e2-9437-f46d049aaeca  ONLINE       3 1.13M     0
        gptid/60570005-3ff2-11e2-9437-f46d049aaeca  ONLINE       0     0     0
        gptid/60ebeaa5-3ff2-11e2-9437-f46d049aaeca  ONLINE       0     0     0
        gptid/61925b86-3ff2-11e2-9437-f46d049aaeca  ONLINE       0     0     0

errors: No known data errors

What should I do? scrub the pool?

Best Answer

Type zpool clear raid2 to clear the errors and initiate a scrub.

If the errors persist following that, replace the disk.

More details about the hardware would help, so this is generic advice. My recommendation for bunch of consumer disks connected to a PC motherboard are different than what I'd do for enterprise-level gear.

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