Date: Fri, 10 Jun 2011 09:43:14 +0100 From: Karl Pielorz <kpielorz_lst@tdx.co.uk> To: freebsd-fs@freebsd.org Subject: ZFS scrub 'repaired' pool with no chksum or read errors? Message-ID: <729A0755FAEF480774EEF4AB@HexaDeca64.dmpriest.net.uk>
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Hi,
I'm running FreeBSD-8.2R amd64 w/4Gb of ECC RAM on a machine used for
'offsite' backups (that are copied to it using zfs send/receive).
I scrub this machine every now and again (about once a month) - recently
this resulted in the following output after the scrub completed:
"
# zpool status
pool: vol
state: ONLINE
scrub: scrub completed after 2h49m with 0 errors on Thu Jun 9 17:09:31
2011
config:
NAME STATE READ WRITE CKSUM
vol ONLINE 0 0 0
raidz1 ONLINE 0 0 0
ada0 ONLINE 0 0 0 256K repaired
ada1 ONLINE 0 0 0
ada2 ONLINE 0 0 0
errors: No known data errors
"
Should I be worried there was 256k of 'repairs' done, even though there
were no checksum errors, or read errors detected?
The console logged no errors - and nothing shows in syslog.
The machine is always cleanly shut down - and the drives all appear fine
from a SMART point of view - I'm just a bit concerned as to where the
repairs came from - as ZFS doesn't seem to know (or be able to tell me)
either :)
-Kp
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