How to Extend System Partition for Windows Server 2016?

June 23, 2017

This article introduces how to extend Windows Server 2016 system partition using both Windows built-in Disk Management and powerful third-party software.

When you use the Windows Server 2016 operating system, you may find that its partitions are not reasonable, especially the system partition would be too small to store the data or applications. Thus, you need to find a way to extend the system partition for Windows Server 2016, or it may running out of space, which may cause the computer runs slower and slower.

To extend system partition, Windows Server 2016 Disk Management has the function Extend Volume that you can use to extend partition. Here you can right click the system partition, and select Extend Volume, then, you can extend the partition as you want.

DM Extend Volume

Unfortunately, you may meet the situation that the Extend Volume is grayed out so that you cannot extend volume like the following screen shot . So, why it would be grayed out?

Extend Volume Grayed Out

Why Windows Server 2016 Disk Management Extend Volume grayed out?

Although Windows Disk Management has the Extend Volume for you to extend system partition for Windows Server 2016, you may not succeed. Disk Management Extend Volume requires unallocated space adjacent to the partition you want to extend, and it must at the right side of the partition. Otherwise, the Extend Volume would be grayed out like the situation we mentioned above. If there is no unallocated space at the right side of system partition, how could you extend system partition for Windows Server 2016 without losing data?

Extend system partition for Windows Server 2016 without losing data

Using Disk Management to extend partition without unallocated space isn’t a simple thing. You need to delete the partition behind the partition you want to extend, and that would take a risk of losing data on the deleted partition. To extend system partition without losing data for Windows Server 2016 with effortless when the Extend Volume of Disk Management grayed out, you can use a third party software AOMEI Partition Assistant, which provides you extend system partition for Windows Server 2016 even there is no unallocated space near to the system partition. But first, you need install and launch AOMEI Partition Assistant Server.

Situation 1: There is an unallocated space at the right side but not adjacent to the system partition like the following picture shows. The unallocated space is behind D: drive, so if you want to use it to extend C: drive, the Extend Volume of Disk Management must be grayed out.

Extend Volume

Thus, you can use the AOMEI Partition Assistant Server to extend system partition easily.

Method1: First, right click C: drive directly, select Merge Partitions.

Merge Partitions

You can use this feature to merge C: drive with the adjacent partition or all the unallocated space on the disk or both. Like the following screen shot.

Select Partition

Click OK to back to the main interface of this software. Click Apply on the toolbar to execute the operations.

Click Apply

Method2: You can use the Resize partition with the unallocated space on the disk. But you need to move the partition to make it adjacent to the system partition. First, click the D: drive, select Move Partition.

Move Partition

Then, you can change the positions of the unallocated space and D: drive, so that the unallocated space can be adjacent to the system partition. AOMEI Partition Assistant Resize Partition only requires the unallocated space adjacent to the partition you want to extend.

Move to Rightside

After the unallocated space adjacent to the system partition, you can right click C: drive, select Resize Partition.

Resize System Partition

Then, you can drag the edge of C: drive to the right to extend it with this unallocated space.

Extend System Volume

Click Apply to submit the operations.

Apply to Submit

Situation 2: If there is no unallocated space on the disk, you can try to extend C: drive with the free space of other partitions. You can use the Merge Partitions to merge the contiguous partition to it. Or you can use the Allocated Free Space to extend the partition with the free space from other partition.

Actually, there still has many other ways to extend system partition, for example, using the Extend Partition Wizard, add a new hard drive, or change a bigger one. If you want to extend partition in Windows 7 as well as other PC OS, AOMEI Partition Assistant Professional edition will do you a big favor. You can do it as you want.