zpool destroy causes panic

[Dan Langille]

I'm trying to destroy a zfs array which I recently created.  It contains 
nothing of value.

# 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/