Windows Server 2003 R2 is the update version of Windows 2003. Although Windows 2003 R2 has some improvements compared with Windows 2003, the only Windows built-in tool that can extend disk volume in Windows 2003 R2 is Diskpart command. However, Diskpart command in Windows 2003 R2 only enables you to extend a NTFS data volume. In another word, you cannot extend an FAT32 partition and you cannot extend a system partition by using Diskpart command. In this situation, you will need to rely on other method to extend system partition on Windows Server 2003 R2.