Re: Apparently spurious ZFS CRC errors (was Re: ZFS data error without reasons)

From: Mark Powell <M.S.Powell_at_salford.ac.uk>
Date: Tue, 7 Apr 2009 14:38:21 +0100 (BST)
On Tue, 7 Apr 2009, Mark Powell wrote:
> Curiously CRC errors on both pools appeared at the same time. I've been 
> running zpool status from cron every minute and all these new CRC errors, 
> occured within two consecutive minutes:

Actually that was the status of a current scrub to see if the errors would 
go away. A zpool status from the time it occured:

-----
Tue Apr  7 10:56:01 BST 2009

pool: pool
  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: scrub completed after 4h10m with 0 errors on Tue Apr  7 06:10:52 
2009
config:

         NAME             STATE     READ WRITE CKSUM
         pool             ONLINE       0     0     0
           raidz1         ONLINE       0     0     0
             stripe/str0  ONLINE       0     0     0
             ad8          ONLINE       0     0     0
             ad10         ONLINE       0     0     0
             ad12         ONLINE       0     0     0
             ad14         ONLINE       0     0     1

errors: No known data errors

   pool: pool2
  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: scrub completed after 5h22m with 0 errors on Tue Apr  7 07:22:26 
2009
config:

         NAME        STATE     READ WRITE CKSUM
         pool2       ONLINE       0     0     0
           raidz2    ONLINE       0     0     0
             ad18    ONLINE       0     0     0
             ad20    ONLINE       0     0     4
             ad22    ONLINE       0     0     2
             ad24    ONLINE       0     0     0
             ad26    ONLINE       0     0     0
             ad28    ONLINE       0     0     6

errors: No known data errors
-----

   Cheers.

-- 
Mark Powell - UNIX System Administrator - The University of Salford
Information & Learning Services, Clifford Whitworth Building,
Salford University, Manchester, M5 4WT, UK.
Tel: +44 161 295 6843  Fax: +44 161 295 5888  www.pgp.com for PGP key
Received on Tue Apr 07 2009 - 11:38:25 UTC

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