Hi, I recently bought a WD 500gb 5400rpm scorpio blue drive. But since installing it in my MacBook Pro I have noticed a "woosh" noise which happnes for a bit then stops, then starts up again after a few seconds. Also I have noticed OS X hangs every now and then, which I'm sure didn't happen before. Hope someone is able to help because I don't want the hard drive to wear itself out by needlessly spinning. Thanks a lot.