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HELP! Fixing logical volume problem

Hi,

It appears I accidentally renamed my main logical volume and now RHEL58 machine cannot boot normally. The original logvolume names were VolGroup00 and LogVol01, LogVol02, etc. The last command I used was

Code:

vgrename -t VolGroup00 SysVolume

which should not change records but should only make and keep the change during the current session (if this is correct understanding). Then I rebooted to erase any modifications. However, this is what I got upon reboot:

Code:

 Reading all physical volumes. This may take a while...

 Found volume group "SysVolume" using metadata type lvm2

 Volume group "VolGroup00" not found

Unable to access resume device (/dev/VolGroup00/LogVol01

mount: could not find filesystem '/dev/root'

setuproot: moving /dev failed: No such file or directory

setuproot: error mounting /proc: No such file or directory

setuproot: error mounting /sys: No such file or directory

setuproot: mount failed: No such file or directory

Kernel panic - not syncing: Attempted to kill init!

_

I guess I need to rename SysVolume back to LogVolume00, but I do not know how from the point the the system is stuck at, or how to proceed after logging in with a rescue disc or liveDVD. Please advise...

Booting to a live media and starting with a 'vgscan' to see what the volume is now called. If it just needs to be renamed "VolGroup00" that should be straight forward, you already know the command (minus the -t). You can also use your time in the live environment to back up any important data to an external device or network location just in case something goes wrong.

[SOLVED] HELP! Fixing logical volume problem

Thanks! I was able to use the rescue mode from the installation disk, which put me into a shell, where all vg-related commands could be used with prefix lvm, like "lvm vgrename" instead of just "vgrename". I had first to deactivate the entire renamed logical volume "SysVolume" by using "lvm vgchange -an SysVolume", then "lvm vgrename SysVolume VolGroup00" and activate it back "lvm vgchange -ay VolGroup00" and reboot. Wheeew!