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

[Scott I. Remick]

--- Sergey 'DoubleF' Zaharchenko <doublef at tele-kom.ru> wrote:
> I'm in the process of downloading the floppies...

ok cool

> And what about ad4? Does disklabel show different values for the slice
> and the `c' partition?

Hmm not only are they different as w/ ad6, but I get the same error on the c
partition:

su-2.05b# bsdlabel /dev/ad4s1
# /dev/ad4s1:
8 partitions:
#        size   offset    fstype   [fsize bsize bps/cpg]
  a:  1024000        0    4.2BSD     2048 16384 64008
  b:  2097152  1024000      swap
  c: 40131441        0    unused        0     0         # "raw" part, don't
edit
  d:   524288  3121152    4.2BSD     2048 16384 32776
  e:  1024000  3645440    4.2BSD     2048 16384 64008
  f: 35462001  4669440    4.2BSD     2048 16384 28552

su-2.05b# bsdlabel /dev/ad4s1c
# /dev/ad4s1c:
8 partitions:
#        size   offset    fstype   [fsize bsize bps/cpg]
  a:  1024000       63    4.2BSD     2048 16384 64008
  b:  2097152  1024063      swap
  c: 40131441       63    unused        0     0         # "raw" part, don't
edit
  d:   524288  3121215    4.2BSD     2048 16384 32776
  e:  1024000  3645503    4.2BSD     2048 16384 64008
  f: 35462001  4669503    4.2BSD     2048 16384 28552
partition c: partition extends past end of unit
bsdlabel: partition c doesn't start at 0!
bsdlabel: An incorrect partition c may cause problems for standard system
utilities
partition f: partition extends past end of unit

The plot thickens...