This does not bode well for you, my friend.
From what you describe it sounds like they're both
A possible solution would be a) to try them both in another computer if you have one available to you, b) an unconventional method with which I
have never had success would be to stick them in a bag in the freezer for around 6-8 hours, take them out and try them to see if that will work for data extraction: http://faq.storagereview.com/tiki-index ... taRecovery
"Freezer trick: pack drive in ESD bag, tape shut, shove in freezer for a few hours (or overnight). Remove from freezer and immediately plug into a known working system as a slave drive, then hope it spins up and behaves long enough to copy data."
HOWEVER, be wary of such tricks as they could be the last thing your drive will do.
and c) get another drive that you know is functioning well and attempt again to get the data off of either disk.
The brand names would be helpful to tell use whether you can get warranties, RMAs, disk checking software, or etc.