HDD problem (very slow and shows some errors)

[Agent01]

HDD problem (very slow and shows some errors)
I have a WD hard disk - 640 GB. It got pretty full, so i decided to put in another hard disk (maxton - 80 GB). The first one uses SATA and the second one ATA. I connected the second one on a same cable as my dvd rom (dvd master, hdd slave).

My system became very slow, and that hard disk i added is slow as well. Sometimes it opens, sometimes it doesn't, i get "cyclic redundancy check" errors or "The request could not be performed because of an I/O device error". And now i got The "Drive H:/ is not formatted" error.

Is this a file system error or is my hard disk dying?

I'm using Windows XP SP3.

(maybe it's important - i used that hard disk on my old computer, and when i bought a new computer, i left the old one in the old computer (OS wasn't installed on it). It has like 4 GBs of somewhere 80GB (it always less than specified).

 

[Alex Ethridge]

Determine the brand of each hard disk.

Download the disk manufacturer's testing utility for each one.

Run extensive tests on each disk.

If they come up okay, then it is s file system problem.

Run CHKDSK x: /R on each disk, where you substitute your drive letter for the "x".

When you run it on the C drive, it will say it cannot run because the drive is in use. Ansyer "yes" and restart the computer.