Hello, I have recently installed a Western Digital Scorpio Blue 500GB drive in my 13" MacBook Pro and it makes a constant noise. The noise sounds like the fans are running louder than usual, but the noise clearly comes from the HDD and not the fans. So, I take it this is not normal, so what drive should I get? This is the second WD SB drive I've had and the first one was faulty as it vibrated a lot and you could feel it when resting your hand on the MacBook Pro. The current drive does not have that problem, but this noise is really annoying. What I want is a large capacity drive that is really quiet. The advantage of the WD is that it doesn't make the 'clunk' noies the stock HDD does when you move the MacBook Pro. Does anyone have any suggestions? Thanks.