We have a HP Rackmount Server. It's drivebays are all full, so we got a subsystem for it with double the diskspace. OK, now a few questions:

Can you expand a pool using multiple subsystems?

Would it be better to make a new pool with a volume to move data from the volume out of diskspace?

And last if we do make a new volume, can we copy data over from a user volume, rename the original volume thus making it possible to rename the new volume the name of the original volume?