09-07-2005
I'm not sure if this will work on a version of SunOS as old as you have, but in solaris 2.6 or so on up there is the newfs command. You can do
newfs -Nv /dev/rdsk/c0t0s0d0 (or whatever device your dead filesystem is)
and it will tell you the commands newfs would run and the output of them. The -N switch tells it NOT to create the filesystem, just to do a "dry run" and show you the results.
This may be a much easier way to get the alternate superblock information. Try a man newfs and see if you have that available to you.
Here is what I get when running it on the root filesystem of my workstation:
krypton# newfs -Nv /dev/rdsk/c0t0d0s0
mkfs -F ufs -o N /dev/rdsk/c0t0d0s0 76055280 255 16 8192 1024 229 1 90 8192 t 0 -1 8 16 n
/dev/rdsk/c0t0d0s0: 76055280 sectors in 18641 cylinders of 16 tracks, 255 sectors
37136.4MB in 717 cyl groups (26 c/g, 51.80MB/g, 6400 i/g)
super-block backups (for fsck -F ufs -o b=#) at:
32, 106368, 212704, 319040, 425376, 531712, 638048, 744384, 850720, 957056,
Initializing cylinder groups:
..............
super-block backups for last 10 cylinder groups at:
74999360, 75105696, 75212032, 75318368, 75424704, 75531040, 75637376,
75743712, 75850048, 75956384,
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LEARN ABOUT MINIX
repartit
REPARTITION(8) System Manager's Manual REPARTITION(8)
NAME
repartition - load a partition table
SYNOPSIS
repartition device [partition-file]
DESCRIPTION
Repartition uploads a new partition table for the partitions of device. The table is obtained from the first sector of partition-file if
given, device otherwise. Device may refer to the whole drive or a primary partition, depending on whether you want to upload a partition
or a subpartition table. The partitions will be truncated to fit within the enclosing device like the disk driver does, unless the numbers
are coming from partition-file.
EXAMPLES
repartition /dev/hd0
repartition /dev/hd4 /etc/hd4.table
Reload the partition table of drive 0 setting /dev/hd[1-4], and the subpartition table of /dev/hd4 setting /dev/hd4[a-d] using a file. The
latter may be useful if you need more than the 4 subpartitions a single Minix partition gives you.
DIAGNOSTICS
The new table is printed on standard output.
FILES
/dev/hd[0-9]
SEE ALSO
hd(4), part(8).
BUGS
The disk must be in use for the changes to stick. The partition table of an idle disk will be reloaded on the first open.
AUTHOR
Kees J. Bot (kjb@cs.vu.nl)
REPARTITION(8)