[ale] missing superblock after upgrade

[Matt Smith]

You can use mke2fs with the -n option on the physical device and it will
show you where it would have put the alternate superblocks (without
touching the drive).

--Matt


-----Original Message-----
From: Michael D. Hirsch [mailto:mhirsch at nubridges.com] 
Sent: Friday, September 24, 2004 10:28 AM
To: Atlanta Linux Enthusiasts
Subject: Re: [ale] missing superblock after upgrade


On Friday 24 September 2004 09:11 am, Dow Hurst wrote:
> Now that is weird and reminds me of my problem with the IDE drive.  I 
> think they are multiples of 4096 or 8192.  The ext2 or ext3 man pages 
> ought to tell the distance apart.

Hmm.  You're right.  The e2fsck man page gives some suggestions for
superblock 
locations.  I'll poke around some more, tomorrow.

Thanks,

Michael

> Michael D. Hirsch wrote:
> >I just upgraded my home computer to Mandrake 10.1.  It appeared to go

> >well, but upon reboot it was unable to mount my /usr/local partition

> >(/dev/hdb3). I can't imagine how that got messed up as I wouldn't 
> >expect  the upgrade to even touch that partition, much less write to 
> >it.
> >
> >Anyway, fsck complains that it can't find a superblock for it (it is

> >supposed to be ext3) and that I should try another block.
> >
> >Is there any way to figure out where the superblocks are?  The error

> >message suggested trying 8192, or some such, but that didn't work.  
> >Are  there some common alternate superblocks?
> >
> >Thanks,
> >
> >Michael
> >_______________________________________________
> >Ale mailing list
> >Ale at ale.org
> >http://www.ale.org/mailman/listinfo/ale
>
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