[H] dead drive

[Winterlight]

I have a 18 month old 1TB Seagate HD that has apparently died. I had 
about 800GB of video on it,  two thirds of the space were backups of 
my DVD collection and I still have the DVDs so it could of been a lot 
worse. I was running it in an external drive bay, pretty much 24/7 
when it just disappeared. I have never lost a drive by just 
disappearing, two others I have lost in the past all died slowly with 
failed access warnings or just screwing things up but this just went silently.

 After trying restarts and reboots I put it in another USB2 external 
drive bay with no change, then I stuck it in a PC and the same 
problem. If the BIOS can't see it then I can't recover anything so I 
guess I'm done... unless somebody has another idea?