This step-by-step article describes how to expand the
existing operating system partition during an upgrade to Windows Server 2003.
The revised partition can use only the free space that is adjacent to the
partition that is being expanded. The partition must use the NTFS file system
or be converted to NTFS.IMPORTANT
: Microsoft recommends that you create a full backup of your whole
computer, and then make sure the backup works correctly before you upgrade to
Windows Server 2003.
Expand the Operating System Partition
To expand the operating system partition:
Modify the Unattend.txt File
- Save the
drive:\I386\Unattend.txt file to your local hard
disk, where drive is the CD-ROM drive that contains
the Windows Server 2003 CD-ROM.
- Use a text editor such as Notepad to open the Unattend.txt
file you saved to your local hard disk.
- In the Unattend.txt file, locate the [Unattended] section
of the file, and then add the following text to this section:
ExtendOempartition=1 Make no other changes to the Unattend.txt file.
- On the File menu, click Save, and then quit Notepad.
Start Windows Server 2003 Setup with the Modified Unattend.txt File
- Click Start, and then click Run.
- In the Open box, type
CD-ROMDrive is the CD-ROM drive that contains the
Windows Server 2003 CD-ROM and HardDisk is the hard
disk that contains the modified Unattend.txt file.
- Press ENTER.
Consider the following items before you extend the partition:
- You must first convert the partition to be expanded to
NTFS. The conversion and the partition expansion can both occur during the
- If the boot partition is configured to use disk mirroring,
it cannot be expanded. You must break the mirror before you use the In-place Upgrade option.
- The disk to be expanded must be a basic disk, it cannot be
a dynamic disk.
- The partition expansion cannot use the free space that is
separated from the boot partition by another partition. This space includes the
free space that resides in an extended partition that is adjacent to the boot
- The upgrade process requires 650 megabytes (MB) of free
space on the boot partition for temporary files. Because the boot partition is
extended after the file copy is completed, this method cannot bypass the free
space limitation that is required for the upgrade process to start.
- The ExtendOemPartition option only expands the boot partition. No other partition can be
expanded by using this entry.
- The size you type for the ExtendOemPartition option must be in megabytes. If the current size of the partition
and the ExtendOemPartition total value is greater than the available space, the partition is