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On Fri, 25 Mar 2011 13:10, demelier.david@ wrote:
On 21/03/2011 12:23, Olaf Seibert wrote:
On my production system (still 8.1, I haven't had time yet to upgrade to
8.2) I have a ZFS. Nightly I make snapshots of each filesystem in it.
Suddenly, one of the file systems has no snapshots any more:
$ ls -l /tank/vol-fourquid-1/.zfs
ls: snapshot: Bad file descriptor
total 0
$ ls -l /tank/vol-fourquid-1/.zfs/snapshot
ls: /tank/vol-fourquid-1/.zfs/snapshot: Bad file descriptor
Snapshots in other file systems seem ok, for example:
$ ls -l /home/local/.zfs
total 0
dr-xr-xr-x 9 root wheel 9 Oct 21 2009 snapshot/
$ ls -l /home/local/.zfs/snapshot/
total 32
drwxr-xr-x 48 root vb 48 Apr 19 2010 friday/
drwxr-xr-x 48 root vb 48 Apr 19 2010 monday/
drwxr-xr-x 48 root vb 48 Apr 19 2010 saturday/
drwxr-xr-x 48 root vb 48 Apr 19 2010 sunday/
drwxr-xr-x 48 root vb 48 Apr 19 2010 thursday/
drwxr-xr-x 48 root vb 48 Apr 19 2010 tuesday/
drwxr-xr-x 48 root vb 48 Apr 19 2010 wednesday/
zpool status thinks all is ok:
$ zpool status
pool: tank
state: ONLINE
status: The pool is formatted using an older on-disk format. The pool can
still be used, but some features are unavailable.
action: Upgrade the pool using 'zpool upgrade'. Once this is done, the
pool will no longer be accessible on older software versions.
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
raidz2 ONLINE 0 0 0
da0 ONLINE 0 0 0
da1 ONLINE 0 0 0
da2 ONLINE 0 0 0
da3 ONLINE 0 0 0
da4 ONLINE 0 0 0
da5 ONLINE 0 0 0
errors: No known data errors
How worried should I be about corruption anyway, say if I unmount and
remount the affected file system?
At this point I wouldn't be to worried yet, Its for a snapshot directory
and as I see you are running cross versions here, not judging that is
what is making the difference or the cause of this but can you attempt the
following and report back.
Provide output from: zfs upgrade ; zpool upgrade ; zdb
run: zpool scrub tank
And add to the report back the output of: zpool status -v
PS: There was a problem with the .zfs directories somewhere around 8.0 &
8.1 that could cause a crash, core dump and this was fixed in stable
before 8.2-RELEASE. I would highly suggest you update your system to a
kernel from 8.2-RELEASE to test this as the problem may just up and
disappear before your eyes. Even if you just have to extract a 8.2 kernel
into boot/testkernel it may be well worth it.
I don't know how to manage ZFS filesystem but usually on UFS file system when
you have a bad file descriptor you must run fsck(8) manually to check up the
disk.
Cheers,
- --
Regards,
J. Hellenthal
(0x89D8547E)
JJH48-ARIN
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