Creating a Two Node Cluster

Good afternoon,

I'm looking to build/create an inexpensive two node cluster. I have a SLES11SP1 server that is running XEN as a virtual hosting server, I run about five servers in a virtual environment. I have three USB drives set up to host my Guest servers, what I would like to do is to purchase another USB drive, so that I can use that as an iscsi/SAN server location, it would be 2TB in size, and then I would build my new servers making them cluster enabled. They should then be able to "see" the SAN/iscsi/storage location.

Does anyone have any further suggestions?

Thanks

-DS