It is PROBABLY hardware, but to be certain, put the original drive back in and see if it works. If it still fails (likely), you've got a doorstop. If it works, follow Captain Video's advice and run a non-destructive surface scan on the 120 Gig drive.
There's a difference between needing help, and just being plain ole' lazy.
"You cannot teach a man anything. You can only help him find it for himself." Galileo Galilei (1564-1642)
HR20-700 with 2 TB, HR22-100, HR22-100, HR22-100, HR23-100 all running 0x5cd and networked.