[NTLUG:Discuss] ext2fs problem

[alton@trainers-r-us.com]

Shane Allen wrote:
> 
> Below is the output of two commands. Where I am stuck currently is that I am not terribly familiar with the filesystems... It's not something I've ever spent much time learning.
> 
> Do any of you have any sage advice for how I can go about repairing the drive (array)? Also, if you have a suggestion, what do you think the chances are that the suggestion will work, and what do you think the chances are that it will leave the drive unrecoverable? I don't expect perfect guesses here, obviously. TIA
> 
> [root at enterprise /root]# df -H
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/hda1             255M   71M  170M  30% /
> /dev/hda5             1.0G   12M  972M   2% /home
> /dev/hda8             255M   19k  241M   1% /tmp
> /dev/hda9             3.5G  2.2G  1.1G  66% /usr
> /dev/hda7             510M   72M  411M  15% /var
> /dev/sda              236G  190G   34G  85% /files
> 
> [root at enterprise /root]# fsck /files
> Parallelizing fsck version 1.19 (13-Jul-2000)
> e2fsck 1.19, 13-Jul-2000 for EXT2 FS 0.5b, 95/08/09
> fsck.ext2: Input/output error while trying to open /files
> 
> 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>
> 
> --
> Shane Allen <shane at tacni.net>
> _______________________________________________
> http://www.ntlug.org/mailman/listinfo/discuss

First, unmount /files and run:

mke2fs -n /dev/sda

This will generate output as if it were creating a new filesystem but it
really isn't.  Pick one of the alternate superblocks from the list. 
Then run

e2fsck -b <the block you picked> /dev/sda

Remount /files when it is done.

NOTE:  Although, I have never had to do this in linux, the Solaris
equivalent has worked each and everytime I've had to do it (and that is
more times than I care to remember).

-- 
Alton R. Pouncey, II
SCSA, SCSA, CCNA, CIW Associate
Director of Information Services
'print pack("H*","616c746f6e40747261696e6572732d722d75732e636f6d"), $/'