Hi welcome to the community.
Sorry we are a MS shop here but the NetApp technology (WAFL - Snapdrive - Snapmanager) works great. Every time we get a new DBA they always have their favorite way of doing backups and ask about changing the solution. I now just ask the question "Can your solution restore 500 Gb of SQL database in under 90 seconds, full process?" NetApp can do this so and they come around to the way we do things.
Loads for great docs here
http://www.netapp.com/us/library/technical-reports.html
Just put Oracle into the search box and fill your boots.
Hope it helps
Bren