I have a WD 120 Gig drive that I picked up not to long ago. I installed it, and this is the first drive I have ever had in a system this large and the first of any size or type I have installed. So being a few first I'm a little conserned that a few days ago it picked up a nasty knock and I just lost one drive, and I don't wana loose another because I didn't notice that a screw wasn't quite tight or something. Is this is new drive thing? Or a big drive thing? Or should I be conserned?