I'm on the latest build of Lion. Using FW 800. Just got my 2-bay enclosure yesterday, installed the drives, and it would only recognize one of them. So, I check the connections and all is good. It's pretty hard to mess up a HDD installation, especially in an enclosure. Power cable is good. The FW 800 cable is good. Or, at least, a working USB 2.0 cable is not making the drives work. So I swap positions of the drives so that they are using the other connection that they weren't before. Nothing. Now neither of them are being recognized at all. Last night, I formatted the one drive and even made a TM backup... Urgh! Anyone know what this could be? I am going to try their live chat support this evening when I get off work.