Hi Sol,
What kind of disks?
You should be able to use the fmdump -eV command to identify when the
checksum errors occurred.
Thanks,
Cindy
On 07/28/10 13:41, sol wrote:
Hi
Having just done a scrub of a mirror I've lost a file and I'm curious how this
can happen in a mirror. Doesn't it require the almost impossible scenario
of exactly the same sector being trashed on both disks? However the
zpool status shows checksum errors not I/O errors and I'm not sure what
that means in this case.
I thought that a zfs mirror would be the "ultimate" in protection but it's not!
Any ideas why and how to protect against this in the future?
(BTW it's osol official release 2009.06 snv_111b)
# zpool status -v
pool: liver
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 completed after 3h31m with 1 errors
config:
NAME STATE READ WRITE CKSUM
liver ONLINE 0 0 1
mirror ONLINE 0 0 2
c9d0p0 ONLINE 0 0 2
c10d0p0 ONLINE 0 0 2
errors: Permanent errors have been detected in the following files:
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