ZFS Error (Help please?)

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Entaran

Cadet
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Jul 4, 2013
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Had a power failure (UPS didn't catch it unfortunately) and logged into the web interface to this error message:

  • WARNING: The volume RaidBackup (ZFS) status is UNKNOWN: One or more devices could not be opened. Sufficient replicas exist for the pool to continue functioning in a degraded state.Attach the missing device and online it using 'zpool online'.
Proceeded to pull out the shell and checked it, produced this:
Code:
 zpool status RaidBackup
  pool: RaidBackup
 state: DEGRADED
status: One or more devices could not be opened.  Sufficient replicas exist for
        the pool to continue functioning in a degraded state.
action: Attach the missing device and online it using 'zpool online'.
   see: http://www.sun.com/msg/ZFS-8000-2Q
  scan: scrub in progress since Thu Jul  4 20:55:42 2013
        334G scanned out of 2.04T at 287M/s, 1h44m to go
        0 repaired, 15.97% done
config:
        NAME                                            STATE     READ WRITE CKSUM
        RaidBackup                                      DEGRADED     0     0     0
          raidz1-0                                      DEGRADED     0     0     0
            gptid/148b5fc8-38fd-11e2-b72a-3cd92b06d364  ONLINE       0     0     0
            8919218218043267245                         UNAVAIL      0     0     0  was /dev/gptid/15072f46-38fd-11e2-b72a-3cd92b06d364
            gptid/15813846-38fd-11e2-b72a-3cd92b06d364  ONLINE       0     0     0
        spares
          gptid/160324c3-38fd-11e2-b72a-3cd92b06d364    AVAIL
errors: No known data errors

For the sake of it my understanding is it should've brought the replacement online and marked the offline drive as the replacement (IE: Go get a new drive asap), is this operating "as intended" or is there something more wrong with it? Yes, there's a scrub running atm.
zpool clear did nothing, so I assume it's an ongoing error.
My key questions are: Why did my second drive rename itself suddenly to 89192...etc? And how do I figure out which drive this physcially is inside the box so I can manually check (and/or replace) it?
Also, every 8 minutes my server runs at 100% cpu load for 2 minutes then stops for another 8 minutes producing load averages of about 1.2 on a dual core machine. Should I be concerned or is it related to the downed drive?
 
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