Need a 1TB drive, that has to have FW. preferably a single drive, to reduce failure rate. id rather not have to buy a RAID bay. i have a 750gb owc mercury elite pro right now and am quite happy with it, but i just am running out of room. i know they have a 1tb drive, but its 2 diff drives in there i think. i care most about reliability, and will sacrifice a little performance for it. should i get this and then do a RAID 1? will that mean if one of the drives fails, i could put in another and my data will still be there?