I have a IBM 20GB laptop hard drive in an external case. I just picked it up and it slipped from my hand and the drive fell, while in its case on a carpeted floor from about 4 feet. Right after that I plugged it in and it started clicking. At the end of the day by dropping it on purpose from 6 inches and shakeing it, it spins up now fine with no clicking and I can hear the heads moving and the drive seeking but my computers don't recognize it. Is the drive broken or is the external case damaged? PLZ HELP!!! I just scanned the drive before I dropped it and IT HAD NO BAD SECTORS!!!! I NEED THIS DRIVE!!!!