That sounds like a head crash i'm afraid. Usually the final word in
dead hard drives ;\ Had it happen three times to different external
SCSI IBM drives before i decided to never touch IBM again.
I may be possible to hit the drive to get the heads mobile again
though you are looking for a real professional to even think about
that one. You will probably have to pay for data backup and some very
high price (i had to just bin my drives when they crashed). Data
recovery will probably have to remove the platters and use a deckstar
controller to get the info off.
If it ever does work briefly start backing up onto anything cause the
drive is still in a very bad shape.
WEZ!
I've heard an old story of mac techies sitting down a Mac Classic
with crashed heads on a swivel chair and spinning it very fast then
stopping it abruptly to get the heads to move again. I think the
comedy of that story was walking into a room with two techies learing
over a mac classic on a swivel chair and spinning it like mad.. NOW
YOU WILL TALK MURHAHAHHA