[CentOS] Freeing pv space for snapshots

> OK, guess I answered my own questions:
>
> # resize2fs -p /dev/VolGroup00/LogVol00 30G
> resize2fs 1.35 (28-Feb-2004)
> /dev/VolGroup00/LogVol00 is mounted; can't resize a mounted filesystem!
>
> But how do I mount it when booted up on CD when it's burried somewhere in
> the LVM on hda2?
>
>   
I've booted up a Knoppix CD to grow my root filesystem before. As long 
as the boot CD you have contains LVM support, you should be good.

You will probably need to run the following commands to get your LVM 
partitions recognized and get the /dev/ entries created:
vgscan
vgchange -ay

-Shawn