Date: Wed, 15 Feb 2012 15:12:37 +0100 From: Olaf Seibert <O.Seibert@cs.ru.nl> To: freebsd-stable@freebsd.org Subject: Re: ZFS faulted pool problem Message-ID: <20120215141237.GA40349@twoquid.cs.ru.nl> In-Reply-To: <20120213155902.GE867@twoquid.cs.ru.nl> References: <20120213155902.GE867@twoquid.cs.ru.nl>
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I'm still (or again) in more or less the same situation as before.
I have tried things like exporting the pool and re-importing it. However
the import didn't even want to work. Only once I found an undocumented
"zpool import -V" option by UTSLing, the pool got imported again, but
still without an attempt at resilvering.
There also exist (undocumented) -F (rewind) and -X (extreme rewind)
options for zpool import and zpool clear. However, the effect of -X
seems to be that some extremely lengthy operation is attempted, that
never finishes. In some cases, a reboot was necessary to terminate the
process.
I have also tried to remove an extra disk, on the theory that with
raidz2 you can miss 2 disks, and that the problem might be restricted to
a single disk. I haven't done each disk yet, but so far there was no
success. (I "removed" each disk by unconfiguring the pass-through on the
Areca web interface).
$ zpool status
pool: tank
state: FAULTED
status: One or more devices could not be opened. There are insufficient
replicas for the pool to continue functioning.
action: Attach the missing device and online it using 'zpool online'.
see: http://www.sun.com/msg/ZFS-8000-3C
scan: scrub repaired 0 in 49h3m with 2 errors on Fri Jan 20 15:10:35 2012
config:
NAME STATE READ WRITE CKSUM
tank FAULTED 0 0 2
raidz2-0 DEGRADED 0 0 8
da0 ONLINE 0 0 0
da1 ONLINE 0 0 0
da2 ONLINE 0 0 0
da3 ONLINE 0 0 0
3758301462980058947 UNAVAIL 0 0 0 was /dev/da4
da5 ONLINE 0 0 0
fourquid.1:~$ sudo zpool online tank da4
cannot open 'tank': pool is unavailable
fourquid.1:~$ sudo zpool clear -nF tank
fourquid.1:~$ sudo zpool clear -F tank
cannot clear errors for tank: I/O error
fourquid.1:~$ sudo zpool clear -nFX tank
(no output, uses some cpu, some I/O)
zdb -v ok
zdb -v -c tank zdb: can't open 'tank': input/output error
zdb -v -l /dev/da[01235] ok
zdb -v -u tank zdb: can't open 'tank': Input/output error
zdb -v -l -u /dev/da[01235] ok
zdb -v -m tank zdb: can't open 'tank': Input/output error
zdb -v -m -X tank no output, uses cpu and I/O$
zdb -v -i tank zdb: can't open 'tank': Input/output error
zdb -v -i -F tank zdb: can't open 'tank': Input/output error
zdb -v -i -X tank no output, uses cpu and I/O
Any ideas?
-Olaf.
--
Pipe rene = new PipePicture(); assert(Not rene.GetType().Equals(Pipe));
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