zpool destroy causes panic

[Dan Langille]

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 at 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/