Hi Scott,
My architecture is as follows
I have a primary server and its own LVM with the data directories pointing to its own SAN. On the DR end we have a similar set up with its on LVM pointing to its own directory structure and pointing to its own SAN . The replication happens between primary and DR SAN.
The reason we opted for this architecture is we a re using multiple data base types and to maintain data integrity b/w these we take lvm level snap shots .
Thanks
Rahul