Hi all, I recently bought a WD 1TB My Book Studio. I love it and it's really fast. But it's started to unmount it's self periodically. It also once in a while does not mount, and it takes me forever to get it working again. I have some friends who have a WD drive as well, and they said sometimes theirs won't mount either. Is this something I should be worried about? Or is it normal? Thanks!