Re: ffs can't find superblock

[David Laight <david%l8s.co.uk@localhost>]

On Sat, Feb 05, 2011 at 12:25:57AM +0200, Alan Barrett wrote:
> 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".

I wouldn't run fsck on that filesystem, it might remove any chance
of recovering some of the data.
You need something non-destructive that tries to recover files to
a different disk.

        David

-- 
David Laight: david%l8s.co.uk@localhost