Hi I've just picked up a LaCie 2big Thunderbolt series 6TB drive. It has two thunderbolt ports on the back of the drive. We'd like to have two iMacs plugged into this drive and thus be able to share it. Currently the drive will only show up on one iMac at a time. Is it possible for us to plug two computers into the one drive? Or is the second thunderbolt port just for daisy-chaining drives? Cheers!