This article is adequate for Windows XP professional (64-bit) and all versions of Windows Server 2003. Solution may not be related to Windows 2000, please visit the selected volume cannot be extended in Windows 2000 Server and Professional.
Question: I have a Windows Small Business Server 2003. The hard drive is 30GB with 10GB allocated to C: drive and 20GB for D: partition. Now C: drive is extremely full but D: almost empty. In snap-in Disk Management, right click on C: drive and there is no "Extend Volume" feature. I know dynamic disk has this feature, so I converted to dynamic disk and all volumes are shown as simple volume. I deleted D: volume so it became unallocated space. However, when I attempted to extend C: drive, I received the 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".
Reasons: You cannot extend a system volume, boot volume, striped volume, mirrored volume, or RAID-5 volume on dynamic disk. You can only extend simple or spanned volumes that are not system or boot volumes, as long as there is available disk space. This includes volumes created as dynamic volumes or created as basic volumes and then upgraded to dynamic in Windows XP Professional or Windows Server 2003 Operating Systems.
Solution1: Convert Windows SBS 2003 dynamic disk back to basic with AOMEI Dynamic Disk Converter Server Edition. Then extend system partition under basic disk in Windows 2003 with AOMEI Partition Assistant Server Edition.
Solution2: Extend dynamic system volume with AOMEI Dynamic Disk Manager Server Edition. (Recommended)
Summary: The Solution1 is an indirect way and needs two steps. Although it can solve the problem without losing data, I strongly recommend Solution2 which can directly extend system volume on dynamic disk and also keep data intact.
Benefits of AOMEI Dynamic Disk Manager
Built on new and enhanced data protection technique, AOMEI Dynamic Disk Manager enable you to perform advanced dynamic volume management that native Disk Management cannot realize.
Easy-to-use and user-friendly layout
AOMEI Dynamic Disk Manager is designed for home users and IT professionals. No matter what you are, non-experienced beginners or computer geeks, you can complete all operations with its fresh and graphical interface.
Solutions for Windows-based system
As a feature-rich tool, AOMEI Dynamic Disk Manager can help you resize dynamic disk, extend/shrink dynamic volume, move volume slice, add drive to RAID and remove drive from RAID in Windows 7/8/Vista/XP/2000 and Windows Server 2000/2003/2008/2011/2012 (support 32/64 bit). The volumes include system volume, boot volume and simple/spanned/striped/mirrored/RAID-5.
How to extend system volume on dynamic disk for Windows Server 2003?
Firstly, run AOMEI Dynamic Disk Manager Server Edition as administrator. If there is no contiguous unallocated space behind system volume, you can shrink volume to generate it; if the unallocated space is separated by volume slice, you can use "Move Volume Slice Wizard" to make unallocated space be behind system volume. Right click system volume and select "Resize/Move Volume" once there is some contiguous unallocated space. Learn more detailed step, please visit: Extend dynamic system volume for Windows Server 2003
Tips: Don’t want to get the selected volume is system or boot or similar error messages, why not free download and check how it works?
For Enterprise users, AOMEI Dynamic Disk Manager Unlimited Edition is a better choice to support unlimited usage within one company to save time and money.