[GLLUG] Mount ext2/3 drive on OS X

[Dennis Kelly]

That filesystem (and maybe the disk!) sound in pretty bad shape.  If
you have data you need on it,  ext has backup copies of the
superblock.  You can use mke2fs -n [dev]  (don't forget -n!!!) to
determine where they would be on your system:

sudo mke2fs -n /dev/sda2
[snip]
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736

You could probably just try using these values on your system.  Then
use mount to specify the superblock:

mount -o sb=[block #]  [rest of mount command]

i.e. mount -o sb=32768 /dev/sda1 /mnt

dpk

On 8/8/07, Karl Schuttler <rexykik at gmail.com> wrote:
> If you have a linux boot cd, you might try mounting it there, just to
> see if it is an OSX error, although by the sound of it, it is not.
>
> On 8/8/07, Dan Ryan <thethinkbox at gmail.com> wrote:
> > Has anyone tried/succeeded in mounting a ext2 or ext3 formatted drive
> > under OS X?  I have downloaded extfs manager from SourceForge and
> > tried using the utility to mount it, but it keeps telling me I have a
> > bad super block.  What does that mean?  Running e2fsck -b xxxx /dev/
> > drive gives me the same error.  Running mke2fs looked like it was
> > fixing things but that, too, pulled up the same problem.
> >
> > Cheers,
> > Dan