Date: Sun, 25 Jul 2010 14:17:38 -0400 From: Dan Langille <dan@langille.org> To: stable@freebsd.org Subject: Re: zpool destroy causes panic Message-ID: <4C4C7FC2.5030605@langille.org> In-Reply-To: <4C4C7B4A.7010003@langille.org> References: <4C4C7B4A.7010003@langille.org>
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On 7/25/2010 1:58 PM, Dan Langille wrote: > I'm trying to destroy a zfs array which I recently created. It contains > nothing of value. Oh... I left this out: FreeBSD kraken.unixathome.org 8.0-STABLE FreeBSD 8.0-STABLE #0: Fri Mar 5 00:46:11 EST 2010 dan@kraken.example.org:/usr/obj/usr/src/sys/KRAKEN amd64 > > # zpool status > pool: storage > state: ONLINE > status: One or more devices could not be used because the label is > missing or > invalid. Sufficient replicas exist for the pool to continue > functioning in a degraded state. > action: Replace the device using 'zpool replace'. > see: http://www.sun.com/msg/ZFS-8000-4J > scrub: none requested > config: > > NAME STATE READ WRITE CKSUM > storage ONLINE 0 0 0 > raidz2 ONLINE 0 0 0 > gpt/disk01 ONLINE 0 0 0 > gpt/disk02 ONLINE 0 0 0 > gpt/disk03 ONLINE 0 0 0 > gpt/disk04 ONLINE 0 0 0 > gpt/disk05 ONLINE 0 0 0 > /tmp/sparsefile1.img UNAVAIL 0 0 0 corrupted data > /tmp/sparsefile2.img UNAVAIL 0 0 0 corrupted data > > errors: No known data errors > > Why sparse files? See this post: > > http://docs.freebsd.org/cgi/getmsg.cgi?fetch=1007077+0+archive/2010/freebsd-stable/20100725.freebsd-stable > > > The two tmp files were created via: > > dd if=/dev/zero of=/tmp/sparsefile1.img bs=1 count=0 oseek=1862g > dd if=/dev/zero of=/tmp/sparsefile2.img bs=1 count=0 oseek=1862g > > And the array created with: > > zpool create -f storage raidz2 gpt/disk01 gpt/disk02 gpt/disk03 \ > gpt/disk04 gpt/disk05 /tmp/sparsefile1.img /tmp/sparsefile2.img > > The -f flag was required to avoid this message: > > invalid vdev specification > use '-f' to override the following errors: > mismatched replication level: raidz contains both files and devices > > > I tried to offline one of the sparse files: > > zpool offline storage /tmp/sparsefile2.img > > That caused a panic: http://www.langille.org/tmp/zpool-offline-panic.jpg > > After rebooting, I rm'd both /tmp/sparsefile1.img and > /tmp/sparsefile2.img without thinking they were still in the zpool. Now > I am unable to destroy the pool. The system panics. I disabled ZFS via > /etc/rc.conf, rebooted, recreated the two sparse files, then did a > forcestart of zfs. Then I saw: > > # zpool status > pool: storage > state: ONLINE > status: One or more devices could not be used because the label is > missing or > invalid. Sufficient replicas exist for the pool to continue > functioning in a degraded state. > action: Replace the device using 'zpool replace'. > see: http://www.sun.com/msg/ZFS-8000-4J > scrub: none requested > config: > > NAME STATE READ WRITE CKSUM > storage ONLINE 0 0 0 > raidz2 ONLINE 0 0 0 > gpt/disk01 ONLINE 0 0 0 > gpt/disk02 ONLINE 0 0 0 > gpt/disk03 ONLINE 0 0 0 > gpt/disk04 ONLINE 0 0 0 > gpt/disk05 ONLINE 0 0 0 > /tmp/sparsefile1.img UNAVAIL 0 0 0 corrupted data > /tmp/sparsefile2.img UNAVAIL 0 0 0 corrupted data > > errors: No known data errors > > > Another attempt to destroy the array created a panic. > > Suggestions as to how to remove this array and get started again? > -- Dan Langille - http://langille.org/
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