Can't find other Hard Drive in My Computer

[peropedala]

I have 2 Hard Disc drives, but in My Computer only 1 is shown.
That one that is shown is Master (Local Disc C and other hard drive is Slave (Local Disc D.
Slave drive was visible before I made Low Level Format on it. When i made Low Level Format, that slave drive wasn't shown in My Computer and I don't know how to access it.
After that i reinstalled driver for it, and nothing. It still isn't shown in My Computer.

Any ideas why it is not shown or accessible?

 

[johnb35]

Right click my computer icon, click on properties, click on manage, click on disk management and assign it a drive letter. Then it will show up in My computer.

 

[peropedala]

I am using Windows 7 (genuine), and it's little different.
I found Disk Management somehow, but I can't see my other drive there also.
Only my Local Disc C:, and system reserved memory.
It is strange that my pc found that hard drive and installed driver but can't find it anywhere or access it.