Resize disk in windows server 2003

To extend a disk in windows 2003 use diskpart.

To use Diskpart.exe, follow these steps:

1. Open a command prompt by going to Start | Run.
2. Enter diskpart in the Open text box, and press [Enter].
3. At the DISKPART prompt, enter list volume. Listing A provides an example of the results.
4. Enter select volume x, where x is the volume number listed that you want to expand.
5. Enter extend, and press [Enter].

When you’re finished, use the Disk Management snap-in to check out your new volume. It should now take up the rest of the available space on the device.