So I haven't really used the 1TB from my i7 because I immediately transplanted in my OCZ Vertex SSD which, of course, is silent. However, I just shoved the Seagate 1TB drive into an enclosure and am running it via Firewire 800. OMG! It has this awful droning sound. I'm copying a ton of stuff from a 2.5" USB drive to it right now and it's droning the whole time. The drone sound fades in... and out.... and in.... and out. WTF is up with these drives? I'm seriously not excited about using it even as an external drive what with the racket it makes.