kernal dump on zfs file system panic?!? "panic: ffs_blkfree freeing free block"

[Wojciech Puchar]

>
> dev = twed0s1d, block = 1, fs = /archive
> panic: ffs_blkfree freeing free block

looks like ffs related panic, not ZFS.

something is completely wrong here.

> cpuid = 1
> Uptime = 11m23s
> Physical memory: 1011 MB
> Dumping 67 MB: 52 36 20 4
> Dump complete
>
> /archive has no files in it as it is an empty filesystem.  In fact, it's a 
> seperate spindle from the OS disk.
>
> fsck does not resolve the problem:
>
> #> umount /archive
> #> fsck -t zfs /dev/twed0s1d
>
> and I've verified that the disks involved don't have bad blocks.  Since the 
> machine becomes non-responsive after the dump, I can't access logs or 
> anything to see what happened.
>
> Machine is using ASUS P2B-D mainboard (dual 500Mhz PIII Intel), with a 3ware 
> 7000-2 raid card.  The 3ware has 2 Maxtor 200GB drives in a RAID-1; these 
> would normally be mounted as /archive.  The volume is empty (no files).
>
> Google shows lot's of people having similar problems with zfs, but no 
> solutions that I have found yet.
>
> Anyone have any ideas?
>
> 	Thanks,
>
> John H. Nyhuis
> IT Manager
> Dept. of Pediatrics
> HS RR541C, Box 356320
> University of Washington
> Desk: (206)-685-3884
> jnyhuis at u.washington.edu
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