HDD Failure or HDD problems? HELP!

Ok ive got a problem with one of my 2 HDD's, HDD 1:Maxtor 20GB HDD 2: Seagate 120GB. Yesterday i was surfing the internet then my comp froze (was weird cuz my comp never freezes) i restarted then it said it wanted to do a DiskCheck but i cancelled. When i have both hardrive plugged in my comp will slow down to almost going backwards then it's normal. When i unplug my F: (seagate) it runs just fine. I noticed when it slowed down the HDD light was constintly on, when it when normal the light went off. I can go into my C: (Maxtor) but cant go into my F: (seagate). Says parameter is wrong. Its hardly used what could cause this?

 

if it's still under warantee get it replaced

 

What about the files, i can't simply replace them, ide have to make all of the data thats on that disc, is there any way to access the bad drive? Or tell what is wrong with it?

 

There are various manufacturer's hard drive tools available from the downloads section here, which will check the integrity of the drive in question.