Originally Posted by BadBrad

Did you let the drive cool all the way down and try spinning it up again? I've recovered data from a drive with bad bearings by putting it into a ziplock bag and putting it in the freezer for 15 minutes. Then installing it, copying what I could, and doing it all over again.

Also, 500 servers yourself is a bunch of BS unless all you do is fix them as they go bad. As cheap as drives are you should be doing RAID1.