Date: Mon, 5 Dec 2011 17:07:15 -0500 From: Adam Stylinski <kungfujesus06@gmail.com> To: freebsd-fs@freebsd.org Subject: weird bug with ZFS and SLOG Message-ID: <20111205220715.GA36072@freebsdbox.adamsnet>
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The worst case scenario happened to me where my dedicated SLOG decided to d=
rop off the controller and thus prevent me from importing my pool. I quick=
ly upgrade to FreeBSD 9.0-RC2 after testing this scenario in a VM. It has =
worked successfully in a VM, but it is not working on my hardware for whate=
ver reason. I rollback the pool with zpool import -F share, seems ok, file=
s are there, finishes scrub, very little corruption. I upgrade the pool to=
V28, and the fs's to v5. I then do a:
zpool remove share 15752248745115926170
It returns no errors and pretends like the operation worked, it even appen=
ds it to my zpool history. However, when I do a zpool status, this is what=
I get:
[adam@nasbox ~]$ zpool status
pool: share
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: scrub repaired 0 in 8h57m with 0 errors on Mon Dec 5 12:48:28 2011
config:
NAME STATE READ WRITE CKSUM
share DEGRADED 0 0 0
raidz1-0 ONLINE 0 0 0
ada4 ONLINE 0 0 0
ada1 ONLINE 0 0 0
ada2 ONLINE 0 0 0
ada3 ONLINE 0 0 0
raidz1-1 ONLINE 0 0 0
da3 ONLINE 0 0 0
da0 ONLINE 0 0 0
da2 ONLINE 0 0 0
da1 ONLINE 0 0 0
raidz1-2 ONLINE 0 0 0
aacd0 ONLINE 0 0 0
aacd1 ONLINE 0 0 0
aacd2 ONLINE 0 0 0
aacd3 ONLINE 0 0 0
raidz1-4 ONLINE 0 0 0
aacd4 ONLINE 0 0 0
aacd5 ONLINE 0 0 0
aacd6 ONLINE 0 0 0
aacd7 ONLINE 0 0 0
logs
15752248745115926170 UNAVAIL 0 0 0 was /dev/ada2
errors: 3 data errors, use '-v' for a list
Here is the ending output of zpool history:
2011-12-05.03:38:50 zpool upgrade -V 28 -a
2011-12-05.03:39:09 zpool export share
2011-12-05.03:39:33 zpool import -m share
2011-12-05.03:40:05 zpool remove share 15752248745115926170
2011-12-05.03:41:04 zpool remove share 15752248745115926170
2011-12-05.03:41:18 zpool export share
2011-12-05.03:41:56 zpool import -m share
2011-12-05.03:43:47 zpool remove share 15752248745115926170
2011-12-05.03:47:54 zpool remove share 15752248745115926170
2011-12-05.03:51:20 zpool scrub share
2011-12-05.16:33:01 zfs create share/vardb2
2011-12-05.16:33:32 zfs set compression=3Dgzip-9 share/vardb2
2011-12-05.16:33:38 zfs set atime=3Doff share/vardb2
2011-12-05.16:39:37 zfs destroy share/vardb
2011-12-05.16:39:47 zfs rename share/vardb2 share/vardb
2011-12-05.16:39:53 zfs set mountpoint=3D/var/db share/vardb
2011-12-05.16:47:24 zpool clear share
2011-12-05.16:48:41 zpool remove share 15752248745115926170
2011-12-05.16:53:15 zpool export -f share
2011-12-05.16:55:21 zpool import -m share
2011-12-05.16:55:52 zpool remove share 15752248745115926170
2011-12-05.16:56:56 zpool remove share -f 15752248745115926170
2011-12-05.17:04:07 zpool remove share 15752248745115926170
What is going on here and how do I fix it? =20
--=20
Adam Stylinski
PGP Key: http://pohl.ececs.uc.edu/~adam/publickey.pub
Blog: http://technicallyliving.blogspot.com
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