I've had my 2.4 alum macbook since October. In the past couple of weeks I have noticed a rather loud whirring noise coming from my hard drive. It usually only happens after putting it to sleep a few times. It gets extremely distracting in class. Anyone have any ideas? I won't be able to get to an apple store for at least two weeks, and I don't want to be without my laptop. Oh and I thought it might be the fan at first but the fan is usually running at ~2k RPM when it happens.