Everything was working fine for years like that until lately the system started dropping drive d: When I ran pctools it shows drive F: as the partition with C: yet drive F: is a 1tbyte drive by itself. It seems like drive D: was having I/O issues. I want to change out the drive that has c and d together with a new drive, but I don't know which drive it physically is on the computer. How can I tell?
On Windows 7, click on Start and type Computer Management and click on Computer Management (or click Start -- Run -- click compmgmt.msc -- OK).
Under Computer Management (Local) -- Storage is Disk Management. Click on that. You should then be able to see which drive letter/partition sits on what drive (if you have multiple disks). You could right-click one of the partitions and change drive letter, if you so desire.
I'm not clear as wether you have a 1tb disk with two partitions or two 1tb disks with one partition each...
The easiest way on windows to see drives and partitions is to use the computer management. Go to Start->Run or press WIN+R and type compmgmt.msc
Navigate the left tree to the "Disk manager", it will show you all your volumes on the left upper panel, and all the drives and partitions righ below it (wether they are accesible to windows or not)
You can even delete partitions, change or add another drive letter to a volume, etc.
If you prefer command line you can accomplish the same thing with diskpart.exe