Hi guys, after a scrub my raidz array status showed:
# zpool status
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
scan: scrub repaired 85.5K in 1h21m with 0 errors on Mon Dec 19 06:24:25 2011
config:
NAME STATE READ WRITE CKSUM
pool ONLINE 0 0 0
raidz1-0 ONLINE 0 0 0
ad18 ONLINE 0 0 1
ad19 ONLINE 0 0 0
ad10 ONLINE 0 0 1
ad4 ONLINE 0 0 0
errors: No known data errors
I assume the checksum counts are current and irreconcilable. (Why does
the scan say 'repaired with 0 errors' then?).
What should one do at this point?
I rebooted and ran another scrub, this time it came up with 0 errors
and 0 checksum counts, what does that mean?
I then backed up the array, kicked out ad18 and resilvered it from scratch:
# zpool status
pool: pool
state: DEGRADED
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
scan: resilvered 218G in 1h25m with 14 errors on Wed Dec 21 14:48:47 2011
config:
NAME STATE READ WRITE CKSUM
pool DEGRADED 0 0 14
raidz1-0 DEGRADED 0 0 28
replacing-0 OFFLINE 0 0 0
ad18/old OFFLINE 0 0 0
ad18 ONLINE 0 0 0
ad19 ONLINE 0 0 0
ad10 ONLINE 0 0 0
ad4 ONLINE 0 0 0
errors: 11 data errors, use '-v' for a list
and 'zpool status -v' gives me a list of affected files.
I assume I delete those files, then follow the same procedure on ad10?
# uname -a
FreeBSD file 8.2-STABLE FreeBSD 8.2-STABLE #0: Sat Nov 12 17:51:22 SAST 2011
root@file:/usr/obj/usr/src/sys/COWNEL amd64
ZFS filesystem version 5
ZFS storage pool version 28
ps. I did get 1 disk alert in the logs during this whole process, half an hour
before resilvering:
Dec 21 12:41:48 file kernel: ad10: WARNING - READ_DMA48 UDMA ICRC error
(retrying request) LBA=306763504
Dec 21 12:41:48 file kernel: ad10: FAILURE - READ_DMA48
status=51<READY,DSC,ERROR> error=10<NID_NOT_FOUND> LBA=306763504
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