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Re: Emergency: RADIUS server HDD down!



on Tue, Jan 09, 2001 at 04:45:27PM -0500, Ron Mullins (rmullins@digiterra-inc.com) wrote:
> I think I might have a problem. ;-)
> 
> My radius server (an old DELL P75 with two old Western Digitals) had the
> second drive (holding /usr) go down. e2fsck gave me:
> 
> *****
> e2fsck 1.18, 11-Nov-1999 for EXT2 FS 0.5b, 95/08/09
> Couldn't find ext2 superblock, trying backup blocks...
> e2fsck: Bad magic number in super-block while trying to open /dev/hdc
> 
> The superblock could not be read or does not describe a correct ext2
> filesystem. If the device is valid and it really contains an ext2 filesystem
> (and not swap or ufs or something else), then the superblock is corrupt, and
> you might try running e2fsck with an alternate superblock: e2fsck -b 8193
> <device>
> 
> 
> *****
> 
> How do I recover? e2fsck doesn't even try to run. I know that the ext2
> filesytem is supposed to be robust, but I haven't had the oportunity to
> delve in fs corruption or fixing (guess that shows me, huh?). Is there a
> standard -b <sector> that could be used as the superblock? Any help would be
> appreciated. Slamming my head into reams of HOWTO's hasn't seemed to
> increase the rate of osmosis. :-)

Image the device to a fresh, good, disk.

You may be able to work out bits and pieces of it with debugfs (working
from the image).

You're better off recovering from your system backups.

-- 
Karsten M. Self <kmself@ix.netcom.com>    http://kmself.home.netcom.com/
  What part of "Gestalt" don't you understand?      There is no K5 cabal
   http://gestalt-system.sourceforge.net/        http://www.kuro5hin.org

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