i got an external lacie 320 big disk firewire 800 HDD and it worked fine for a few weeks......now i plug it in, and it doesnt mount on my desktop or when i open up macintosh HD....i tried repairing disk permissions with disk utility but it said there was nothing to repair....disk utility recognizes it but it wont mount at all......and when i unplug it or turn it off, i get the error message that says it wasnt disconnected properly....