Just playing with LVM, and it looks like it’s what I’ve been looking for in order to merge lots of drives together. I especially like the fact that I can remove a drive from the equation. Anyway, here are a few good sites I’ll have to re-read on how to manage an LVM file system.
Link 1 – Shrink an LVM volume
Link 3

One other thing I found is that in order to resize a volume, I need to unmount it first. That can be done just by selecting “_blank_” from the mount point drop down menu. Hit apply, and then go about the operation. When done resizing, re-mount it.
Do everything in the LVM menu is yast. Don’t go into the Partitioner option, since I kept getting error when trying certain operations on the LVM volumes.
And it seems that if a physical volume is removed (becuase let’s say it’s corrupt) I cannot rebuild the remainig data. I only tried with 3 partitions, and removed the middle one, but with no positive results with reiserfs.

One note: XFS can be expanded (grown) but it cannot be shrunk. ReiserFS can do both.