From owner-freebsd-fs@FreeBSD.ORG  Sat Oct 24 00:39:57 2009
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Date: Sat, 24 Oct 2009 09:39:53 +0900
Message-ID: <m2zl7hwrom.wl%randy@psg.com>
From: Randy Bush <randy@psg.com>
To: freebsd-fs <freebsd-fs@freebsd.org>
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Subject: to err or not to err
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so, were there errors or not?  do i worry/act or not?

randy

---

dfw1# zpool status -v
  pool: tank
 state: ONLINE
status: One or more devices has experienced an error resulting in data
        corruption.  Applications may be affected.
action: Restore the file in question if possible.  Otherwise restore the
        entire pool from backup.
   see: http://www.sun.com/msg/ZFS-8000-8A
 scrub: scrub in progress for 0h5m, 8.59% done, 1h3m to go
config:

        NAME               STATE     READ WRITE CKSUM
        tank               ONLINE       0     0     0
          mirror           ONLINE       0     0     0
            label/m00-d01  ONLINE       0     0     0
            label/m00-d00  ONLINE       0     0     0
          mirror           ONLINE       0     0     0
            label/m01-d00  ONLINE       0     0     0
            label/m01-d01  ONLINE       0     0     0
          mirror           ONLINE       0     0     0
            label/m02-d00  ONLINE       0     0     0
            label/m02-d01  ONLINE       0     0     0
          mirror           ONLINE       0     0     0
            label/m03-d00  ONLINE       0     0     0
            label/m03-d01  ONLINE       0     0     0
          mirror           ONLINE       0     0     0
            label/m04-d00  ONLINE       0     0     0
            label/m04-d01  ONLINE       0     0     0
          mirror           ONLINE       0     0     0
            label/m05-d00  ONLINE       0     0     0
            label/m05-d01  ONLINE       0     0     0

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

        tank/dfw1:<0x8dffc>
        tank/dfw1:<0xcfd>
        tank/dfw1:<0x8dffd>

< some hours later >

dfw1# zpool status -v
  pool: tank
 state: ONLINE
 scrub: scrub completed after 0h53m with 0 errors on Fri Oct 23 15:20:43 2009
config:

        NAME               STATE     READ WRITE CKSUM
        tank               ONLINE       0     0     0
          mirror           ONLINE       0     0     0
            label/m00-d01  ONLINE       0     0     0
            label/m00-d00  ONLINE       0     0     0
          mirror           ONLINE       0     0     0
            label/m01-d00  ONLINE       0     0     0
            label/m01-d01  ONLINE       0     0     0
          mirror           ONLINE       0     0     0
            label/m02-d00  ONLINE       0     0     0
            label/m02-d01  ONLINE       0     0     0
          mirror           ONLINE       0     0     0
            label/m03-d00  ONLINE       0     0     0
            label/m03-d01  ONLINE       0     0     0
          mirror           ONLINE       0     0     0
            label/m04-d00  ONLINE       0     0     0
            label/m04-d01  ONLINE       0     0     0
          mirror           ONLINE       0     0     0
            label/m05-d00  ONLINE       0     0     0
            label/m05-d01  ONLINE       0     0     0

errors: No known data errors

-30-