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KevinBugg (TechnicalUser)
23 Feb 08 5:04
Hi,

All of a sudden our Redhat 4.1.8 Server decided to restart (we think) and upon reboot we get the following error:

"/dev/VolGroup00/LVol0:
The superblock could not be read or does not describe a correct ext2 filesystem.  If the device is valid and it really contains an ext 2 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 - 8193 <device>

Fsck.ext 3: No such file or directory while trying to open /dev/VolGroup00/LVol0
[failed]"

The guy who maintained the linux system left 2 weeks ago and all that is left is Linux novices.  Please can someone help with an idiots guide to try and help us resolve this issue?

Thanks

Kev
KenCunningham (TechnicalUser)
23 Feb 08 10:56
Have you tried the e2fsck? Sorry, Im not familiar with it, but this article might help:

http://archives.free.net.ph/message/20071002.193847.a68af972.en.html

Good luck!

I want to be good, is that not enough?

Annihilannic (MIS)
24 Feb 08 17:48
What's the output of cat /etc/redhat-release?

What state is the system in right now?  Do you have a shell prompt?  Do all the hard drives appear to be spinning?

I don't think an fsck of any flavour will work at this stage due to the "No such file or directory while trying to open /dev/VolGroup00/LVol0" error, first we need to try and get the logical volume started.

Does vgdisplay -v display anything?

Annihilannic.

QatQat (IS/IT--Management)
2 Mar 08 12:33
Can you run system-config-lvm? If not, does it give the same error?

If not, you may be affected by an old bug in RH that has been fixed in Vers 5. Probably the old guy attempted a Volume resize (especially if shrinking Volumes on MD drives created with MDADM) that did not succeed. In that case I do not think there is a fix for it, just look for a good backup that you obviously have, am I right?

Restore, update your system, re-run MDADM (if needed), re-create your volume.

A good tip is to not do it with the graphic installer but instead, get yourself a good reference and leave all involved drives untouched at install time. Create your partitions, MD drives and volumes from command prompt; you will learn a lot about it and also have a greater control over the whole process.


QatQat


If I could have sex each time I reboot my server, I would definitely prefer Windoz over Linux!

macd68 (TechnicalUser)
2 Mar 08 16:05
Make sure that lvm support is loaded. Check the output of lsmod. Disregard obviously if other lvm filesystems are already mounted.

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