Adding esata to my Mac Pro, how many?

Hey guys,

I'd like to add esata to my rig for work now and am looking at this due to the hot swappable capability.

Sonnet Technology TSATAII-E2P Tempo SATA E2P PCIe... in stock at OWC

Am I able to add more than one of these? Ultimately I'd like to add up to 3/4 drives.

thanks!

Your Mac Pro has four hard drive bays so why the need?

Ahh sorry just saw it is in fact a MacBook Pro. Do laptops actually have PCI slots? Did not think they do another disadvantage to them.

Well, I need to use portable drives for work (example, we shoot a commercial and I dump the footage to external drives for the clients later).. the SSD mags we use have an esata out when i then plug into the back of the mac pro.

I then need 2 more Esata connections for duel drives to dump to.