Recovering from ext2 corruption on an ide drive

[Andre Hedrick]

John,

Before you do what Ted is suggesting, how and what caused this?
What is the hardware combination?
This is extremely important to know if you timing problems.
Failure to correct a timing issue will damage it more.

On Thu, 20 Jan 2000 tytso en MIT.EDU wrote:

>    Date:   Wed, 19 Jan 2000 01:43:55 -0600 (CST)
>    From: John <john en data-source.com>
> 
>    I have some more information regarding this ide filesystem corruption.
>    I did not make one point very clear in my first email:
> 
>    I ran "e2fsck -vyf" only on hda1 and only one time.  The other two
>    partitions, hda2 and hda5 have not been written to at all.
> 
>    I have tried all kinds of things to access my data today.  I was able to
>    set up the old system board that I thought had died and was able to get it
>    to boot.  I ran an 'e2fsck -vnf' on the partitions, and all three were
>    corrupted, with hda1 being the most messed up.
> 
> Are you sure that you didn't get your partition table smashed?  If
> e2fsck isn't given the proper filesystem boundaries, it's not going to
> do anything useful.  That would explain why your hda5 partition is
> smashed:
> 
> e2fsck 1.18, 11-Nov-1999 for EXT2 FS 0.5b, 95/08/09
> e2fsck: Bad magic number in super-block while trying to open /dev/hda5
> 
> 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>
> 
> 
> 						- Ted
> 
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Andre Hedrick
The Linux IDE guy


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