fsck_ext2fs coredump

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

Trying to fix an ailing ubuntu box by netbooting NetBSD, I got a coredump
on:

#        size    offset     fstype [fsize bsize cpg/sgs]
 d: 1953525168         0     unused      0     0        # (Cyl.      0 - 
1938020)
 e: 976751937        63 Linux Ext2      0     0        # (Cyl.      0*- 968999)
 f: 976768065 976752000 Linux Ext2      0     0        # (Cyl. 969000 - 
1938015*)

# fsck /dev/rwd1f
fsck: Cannot open `/etc/fstab': No such file or directory
fsck: Cannot open `/etc/fstab': No such file or directory
** /dev/rwd1f
BAD SUPER BLOCK: INCOMPATIBLE FEATURE BITS IN SUPER BLOCK
fsck: /dev/rwd1f: Floating point exception

Program terminated with signal 8, Arithmetic exception.
#0  0x080528b2 in calcsb (dev=0x8056440 "/dev/rwd1f", devfd=3, fs=0xbfbfdd84)
    at /usr/src/sbin/fsck_ext2fs/setup.c:496
496             fs->e2fs.e2fs_bcount = (pp->p_size * DEV_BSIZE) / 
fs->e2fs_bsize;

which isn't too surprising as *fs is just made up of zeros.

Should I conclude that all the super blocks just contain zeros and this
disk is beyond rescue?

Cheers,

Patrick