I have a strange problem. My Centos 5 box died and had to have the motherboard replaced. I got it back up and running and now when I try to boot I get a "No Volumes Found" message after the linux image is unpacked.
I've downloaded and burned a copy of the Centos 5.4 LiveCD and was able to verify that the harddrive is not damaged. All the files are there, including the LVMs, however Linux won't mount the LVMs when it boots and consequently it fails with a kernel panic.
I should probably mention that during the time it took to get the new mother board, I've tried to take the hard drive and plug it into a Windows box but without any success (I quickly realized that windows won't recognize any of the linux filesystems)