OK so you've got a 120GB hard drive that doesn't work?
"After repeated errors" on your 120GB drive why did you add a further 17gb drive before sorting out the original problem?
What were that repeated errors? What were the error messages.
Why did you not get a back up or restore CD or an o/s CD.
I don't say this often but probably the easiest ting to do would be to remove the 17GB drive and reformat the 120GB drive and start from scratch.