I'm looking to build my own external HD enclosure. What do I need to do to install 8 or so HDs in a computer case and have them hook to my Mac pro via ESATA? I do not want to buy a bunch of ESATA cards for my Mac pro. Is there some kind of card or solution to turn 8 HDs into one ESATA output. Maybe via port multiplier. Thanks. Sorry if it sounds confusing.