In another post I made the analogy that Live Volume was similar to storage vmotion from VMware.  Thinking about it a bit more, it’s more similar to VMware Fault Tolerance (but for storage) in that the volumes live in both storage center systems all the time.  The data is kept synchronized, not migrated upon request.  You just switch the “access” from one system to another and the front-end host will follow the storage to the new storage center seamlessly.