Hi Ravi -
You have a couple of options:
1) you can move the archive server to the D: drive
Refer to the instructions (Moving Server Components to Another System) in the Installation Guide (can be found on the CD under Support\Guides\GB\)
2) You can create a new archive server root folder on the D: drive using the Archive Server Configuration tool and install the new vault to this location.
Refer to the instructions (Manage the Archive Server) in the Administration Guide (can be found on the CD under Support\Guides\GB\)