Need advise on setting up solaris 10 2 nodes cluster

I am new to setting up sun solaris 10 cluster, I have 2 sun sparc t3-1 servers (identical), going to use them as web servers (sun one java web server 7), looking for data replication and real time fail over. My question is do I need external storage to configure the cluster? or I can just use the internal hard drive that comes with the server, and what is a quorum server or quorum device? What else do I need to get the cluster up and running? just a simple 2 nodes cluster. Thanks.

Check this cool site, it has many examples for cluster.
Solaris Cluster - Blog O� Matty

The official documents is always the best of best and some times nothing else are comparable to them but other times this is not true they might be obscure or even over complex the task .
Anyways check out here of the official documents
Solaris Sun Cluster x86
http://192.9.162.65/solaris/docs/how-to-install-two-node-cluster.pdf

Thanks for the pdf on 2 nodes clustering, it looks pretty straight forward.

I do find the oracle documents sometimes over complex things.