Cluster without shared disk, or over shared over NFS

Hi

It's possible to run a redhat cluster without the shared disk in a
RHEL 3.0? or do the share using an remote NFS volumen?

In my case, I have 2 servers, and a NetApp Filer serving NFS file
systems. There is any way to put the shared disk in the nfs? Or not
use it at all.

I have read in the archives a mail from Lon Hohberger telling that
it's posible in RHEL 3.0, but not supported:
https://www.redhat.com/archives/piranha-list/2004-April/msg00002.html

Any idea about how to do this?

Marcos