By Cherry / Last Updated August 21, 2019


“I have Windows 2003 32 bit Server and low disk space on C drive. Every time when I am trying to extend the C drive I get the error message below:

‘The selected volume is a system or a boot disk or was created on basic disk in an earlier version of Windows and cannot be extended’

Selected Volume Is System Boot Disk

Is there any way can solve this problem and extend the C drive successfully?”

The selected volume is a system or boot disk

For many Windows 2003 or XP users, it is really a headache problem to extend system volume when C drive is running out of space. That is mainly because there is no extend volume feature in Windows 2003/XP built-in Disk Management tool. Therefore, some users choose to convert basic disk to dynamic because Windows disk management tool can extend simple volumes. But is this really?

After converting to dynamic disk, you may receive this error message: "The selected volume is a system or boot disk or was created on a basic disk in an earlier version of Windows and cannot be extended" when you attempt to extend C drive.

Actually, with Windows built-in disk management tool, you cannot extend a system/boot/striped/mirrored/RAID-5 volume or a volume was created on an earlier version of windows on dynamic disk. You can only extend simple or spanned volumes that are not system or boot volumes, as long as there is free disk space available.

Now you must know Windows built-in tool still contains limitations on dynamic disk. In this scenario, you need AOMEI Partition Assistant Professional (for Windows XP or Windows 7/8/10) AOMEI Partition Assistant Server (for Windows 2003 or Windows Server 2008, 2012, 2016) to help you convert dynamic disk back to basic and then extend system partition or extend dynamic system volume directly. This software can be applied to both basic disks and dynamic disks. So you can try the two methods just with one tool.

How to extend dynamic system volume with dynamic disk manager

Here is an example of how to extend system or boot disk volume with this software:

1. Launch Partition Assistant to get its main interface as below:

2. Right click volume D and select "Resize/Move" option in the drop-down menu.

3. In the pop-up window, drag the left slider rightwards to generate unallocated space. Then, click "OK".

4. Then there is an unallocated space between C and D. Right click C: drive and select "Resize/Move" option.

5. In the dialog box, drag the right slider rightwards to add unallocated space into C drive. Then, click "OK".

6. You can see C drive has been extended. Click "Commit" on the tool bat to submit the operations.

Tip: If you want to convert dynamic disk to basic and then increase C drive space, AOMEI Partition Assistant provides you free edition for Windows PC users including Windows XP/Vista, and Windows 7/8/10.