"Cannot find file system superblock" error - how to recover?

[Scott I. Remick]

--- Sergey 'DoubleF' Zaharchenko <doublef at tele-kom.ru> wrote:
> Well, as it's UFS1 as we've figured out, the next logical thing would be
> to try mounting /dev/ad2s1c r/o, and if that fails, try fscking it.

bash-2.05b# mount -r /dev/ad2s1c /data
mount: /dev/ad2s1c on /data: incorrect super block

bash-2.05b# fsck /dev/ad2s1c
** /dev/ad2s1c
BAD SUPER BLOCK: MAGIC NUMBER WRONG
/dev/ad2s1c: NOT LABELED AS A BSD FILE SYSTEM (unused)