Date: Tue, 03 Jan 2012 14:53:08 +0000 From: Matt Burke <mattblists@icritical.com> To: freebsd-fs@freebsd.org Subject: ZFS v28 on -STABLE not using hot spare Message-ID: <4F031654.1080200@icritical.com>
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Over the holidays one of the disks on a server has failed, but despite
configuring a hot spare, ZFS hasn't used it for some reason. Can anyone
shed some light on what I might have mis-configured to break the hot-spare
functionality?
[root@x ~]# uname -a
FreeBSD x 8.2-STABLE FreeBSD 8.2-STABLE #4: Mon Dec 5 12:43:58 GMT 2011
root@x:/usr/obj/usr/src/sys/x amd64
[root@x ~]# more /usr/src/sys/amd64/conf/x
include GENERIC
ident x
options GEOM_STRIPE
options ROUTETABLES=4
[root@x ~]# zpool status -v
pool: data
state: DEGRADED
status: One or more devices are faulted in response to persistent errors.
Sufficient replicas exist for the pool to continue functioning in a
degraded state.
action: Replace the faulted device, or use 'zpool clear' to mark the device
repaired.
scan: none requested
config:
NAME STATE READ WRITE CKSUM
data DEGRADED 0 0 0
mirror-0 ONLINE 0 0 0
mfid0 ONLINE 0 0 0
mfid14 ONLINE 0 0 0
mirror-1 ONLINE 0 0 0
mfid1 ONLINE 0 0 0
mfid15 ONLINE 0 0 0
mirror-2 DEGRADED 0 0 0
mfid2 ONLINE 0 0 0
mfid16 FAULTED 0 931 0 too many errors
mirror-3 ONLINE 0 0 0
mfid3 ONLINE 0 0 0
mfid17 ONLINE 0 0 0
mirror-4 ONLINE 0 0 0
mfid4 ONLINE 0 0 0
mfid18 ONLINE 0 0 0
mirror-5 ONLINE 0 0 0
mfid5 ONLINE 0 0 0
mfid19 ONLINE 0 0 0
mirror-6 ONLINE 0 0 0
mfid6 ONLINE 0 0 0
mfid20 ONLINE 0 0 0
mirror-7 ONLINE 0 0 0
mfid7 ONLINE 0 0 0
mfid21 ONLINE 0 0 0
mirror-8 ONLINE 0 0 0
mfid8 ONLINE 0 0 0
mfid22 ONLINE 0 0 0
mirror-9 ONLINE 0 0 0
mfid9 ONLINE 0 0 0
mfid23 ONLINE 0 0 0
mirror-10 ONLINE 0 0 0
mfid10 ONLINE 0 0 0
mfid24 ONLINE 0 0 0
logs
mirror-11 ONLINE 0 0 0
mfid13 ONLINE 0 0 0
mfid26 ONLINE 0 0 0
cache
mfid12 ONLINE 0 0 0
mfid25 ONLINE 0 0 0
spares
mfid11 AVAIL
errors: No known data errors
The logs show loads of mfi1 and mfid16 errors for a few minutes, and then
(presumably when ZFS dropped the disk) nothing relevant after that. ZFS
hasn't logged anything, not even that it's failed a disk.
I've manually done a 'zpool replace data mfid16 mfid11' which has brought
the spare in without problems, but I'm eager to learn what I did (or didn't
do?) to cause the spare to not be used automatically.
Thanks in advance,
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