Harddrive hide-n-seek

This is the story. One of my friend bought a new HDD because his windows crashed and he thought it was because of old HDD. So I helped him to re-install Windows onto the new HDD and just for fun we thought lets try if the old HDD is still working so we can use it for storing files. So we have 2 HDDs in, one is Master with Xp on it and the other one is Slave still old copy of XP on it. Both are hooked up to the same IDE cable. When PC starts I can see 2 HDD on BIOS screen. When we get to Windows, there are 2 HDD on Device properties. But when I open My Computer, there is only 1 (the C drive). Why I cant see the old HDD? Any ideas?

i expect the old drive needs formatting which is why its detected in the bios and not windows.
Use the windows xp disk to format the drive.

Hi. As I said I can see it under Device Manager. And I tried F-Disk as well. No luck, it is not there.

try doing it via disk management.

if your bios sees the drive and its in device manager it only means that it can be detected. I think the disk itself may be utterly screwed which is why you cant partition/format the drive to make it visible in windows.

You could try going to the administrative tools in the control panel, then machine management (or something similar) and then to disks. you should be able to format and partition the drive from in there