Veritas Volume Manager divides disks into disk groups and partitions these groups as desired. There is a nice GUI which helps alot. You can even pull up a command window to see what the gui is running. The newest version of the gui is vmsa.
Shared Data Clusters: Scaleable, Manageable, and Highly Available Systems (VERITAS Series) - this will provide you with the background knowledge of how clusters work, how to get the best performance from your cluster, and more.
Links to Veritas products, etc.