[Samba] Need advise on cluster reconfig

[Taylor, Jonn]

I need some advise on setting up a new cluster to replace the existing 
one I have. I am going to reconfigure the disk's that store the data not 
the OS so the servers will stay on CentOS 5. Here is what I need.

Active-Active cluster for load sharing.
samba server to serve profiles, home dir, apps and shares
nfs server

The disk backend is what I am having the most trouble with. Right now I 
am using drbd with gfs and I looking to see if there is something better 
to use.

Jonn