Where did my harddrive go?

I have a 400gb hdd that has my OS (Windows 7) on it, and a 640gb hdd. When I installed the 640gb hdd, I was running Vista and everthing worked fine. Then I installed the Windows 7 RC and my 640gb hdd doesn't appear under the "Computer" menu thing, but Device Manager sees it. So my question is why won't it appear in the "Computer" menu or how do I get it to show up?

Does it show up in Disk Management? (Right click on my computer - manage)G013M

Yes

And what does it show about the drive's partitions in the lower half of the Disk Management window?

It says "Healthy (System, Active, Primary Partition)" Is that whay you were looking for?

It says "Healthy (System, Active, Primary Partition)" Is that whay you were looking for?

DA_muffin_man01

Yes. Does it say that for both the 400GB and 640GB drives?

For the 400gb it says "Healthy (Boot, Page File, Active, Crash Dump, Primary Partition)"

And do both drives have letters assigned to them? (C:, D:, etc.)

If one does not, can you right-click on that drive, select "Change Drive Letter and Path" , and give it a letter?

Its rather unusual that the 640GB drive won't appear in My Computer when Windows sees a healthy partition there.

Hey! That worked! Thank you so much!