[Linux-cluster] Mount drive with bad superblock?

[Wendy Cheng]

isplist at logicore.net wrote:
>> Not sure which filesystem you are talking about ? Based on the
>> "alternate superblocks", I would assume it is ext3 ?  If this is GFS,
>> there is an un-published utility called "gfs_edit" that can be used.
>>     
>
> It was LVM based but I think it was just ext2 or ext3 as a backup to some of 
> the GFS storage. If it was just a drive, I could plug it into another machine, 
> mount it and just get what ever I can off of it using a win machine and 
> software. 
>   

My ext2/3 memory is rusty so really can't help much. Have you tried 
"debugfs /dev/your-lvm-lv-path" to see whether you could get any luck 
with it ?  IIRC, debugfs should allow you to hand edit the ext2/3 
partition. Or you can dd the partition "dd if=/dev/your-lvm-lv-path 
of=/dev/plain-simple-drive ...... ", then take your 
/dev/plain-simple-drive to a window box as you described above.

-- Wendy