Looking to implement this on our own custom built SANs

We want a solution whereby if the storage on the server fails say anywhere from a single drive to the entire server enclosure, a NIC, whatever it is, the HA would kick in and it would go to the backup server (we aim to have a pair or 3 servers) and automatically activate snapshots of the VMs.

Also want more information on stuff like de-dupe, snapshotting, ram caching, replication, etc

Also does anyone currently use this with Cloudstack or OnApp?