Weird noises from your hard drive and you’re not sure what they mean? Well, you know they mean something bad is undoubtedly about to happen, but how do you find out what, exactly?
Go to this Hitachi page and check out the .wav recordings there of various noises you might hear that likely indicate a failing hard drive. Listen to them and weep. But at least you’ll know 
I’ve experienced the slow spindle motor death sound. The scariest sound – head damage #3!
(Via Digg)