Re: ffs can't find superblock

[Alan Barrett <apb%cequrux.com@localhost>]

On Thu, 03 Feb 2011, mortee wrote:
> $ sudo fsck_ffs /dev/rwd3a
> ** /dev/rwd3a
> BAD SUPER BLOCK: CAN'T FIND SUPERBLOCK
> 
> I've already tried specifying a few other possible superblock backup
> locations using -b, but it reports wrong magic number for each one tried.

If the disklabel is correct, you could run newfs(8) with the "-N"
flag to get a list of of alternative superblock locations:

    /sbin/newfs -N -V4 /dev/rwd3a

Then try those locations one by one with "fsck -b".

--apb (Alan Barrett)