Old hard disk not visible

[Yell Srik]

Hi,
I have a HP Pavilion 8622 PC with the hard disk size of 10 GB and Windows XP operating system. The entire hard disk was present as a single drive C: on my machine.
Later i upgraded my system by buying a new hard disk of size 40 GB and partitioned it into 4 drives of 10 GB each and thus i had 5 drives, 4 of them (C, E, F, G ) for my new hard disk and 1 drive (D for my old hard disk. Everything was working fine without any problem.
But for the last couple of days, i am unable to see/view my old hard disk (drive D . the Drive letters have got modified and my combo-drive shows up as drive D. the new hard disk with the 4 partitions is intact.
Recently i upgraded my CRT monitor with a new LCD monitor and i was not present when my hardware vendor changed the monitor. the problem that i had mentioned above is occuring right from the day my monitor was changed. I am not sure if this is the cause of my problem.

Please let me know why my old hard disk is not visible.

Thanks in advance.

[David O'Meara]

I kind of tuned out towards the end, hopefully the CRT stuff wasn't important.

Control Panel> Administrative Tools> Computer Management
Select Storage> Disk Management on the left

If Windows can detect them, you should see two physical devices here eg Disk 0 and Disk 1 with your CD drive too.

If the other disk doesn't show up, it may be dead. If you need to recover the data you could consider stucking it in the freezer.

[Oscar Johansson]

Originally posted by Yell Srik:

Please let me know why my old hard disk is not visible.

Did you try opening up your PC case and taking a good look inside?