Disk partitions are created while installing Windows or by OEM manufacture, after running the server for a period of time, system C: drive is getting full. In that case, is it possible to change partition size without losing data or starting over? The answer is yes. With disk partition tools, you can increase partition size of C drive with free space in other partitions. In this article, I'll show you how to change and increase partition size in Windows Server 2019 with its built-in tool and third party software.
Windows Server 2019 has its built-in Disk Management tool to help change partition size. Shrink Volume function can decrease partition size and release free space to Unallocated. Extend Volume can increase partition size when there is adjacent Unallocated space on the right side. However, Disk Management cannot increase a partition by decreasing another one. In addition, only NTFS partition can be resized with this native tool.
Learn how to shrink partition with Server 2019 Disk Management and what to do if it cannot decrease partition under particular environment.
Before extending a volume in Server 2019 Disk Management, you must delete or shrink another drive to get Unallocated space. When you shrinking drive D with Shrink Volume, Unallocated space can only be made on the right side, but to increase C drive with Extend Volume, Unallocated space must be on the left side of D drive. As you see in the screenshot, Extend Volume greyed out for both C and E drive after shrinking D.
The only option to enable Extend Volume to C drive is by deleting D to get contiguous Unallocated space, but programs and some Windows services are running from it, so you cannot delete it. To decrease and increase partition size in Windows Server 2019, you'd better run server partition software.
There are many choices in the market, but you'd better back up first and run the safest tool, because there's potential system damage and data loss risk while resizing disk partitions. All parameters of associated disk, partition and files must be modified correctly, all files in the partition that requires shrinking and moving must be moved to new locations. Therefore, any software error or hardware issue could cause system/data disaster.
Better than other disk partition software, NIUBI Partition Editor has advanced technologies to protect system and data:
To decrease and increase partition in Windows Server 2019, it is very easy with NIUBI PE, you just need to drag and drop on the disk map.
How to decrease partition size:
Download NIUBI Partition Editor, right click the partition that you want to decrease (here is D:) and select "Resize/Move Volume".
Option 1: If you drag left border towards right or enter an amount in the box of Unallocated space before, then Unallocated space is made on the left.
Option 2: If you drag right border towards left or enter an amount in the box of Unallocated space after, then Unallocated space is made on the right.
How to increase partition size in Windows Server 2019 with NIUBI:
If you want to increase E: drive, make Unallocated space on the right when shrinking D drive. Then drag left border of E towards left to combine Unallocated space.
If you run Windows Server 2019 as guest virtual machine in VMware or Hyper-V, there's no difference to change and increase partition size if there's available free space on the same virtual disk.
When the whole disk is full, unlike physical disk, virtual disk can be extended directly. Follow the steps to increase virtual disk size in VMware or Hyper-V. After expanding disk, additional space is shown as Unallocated on the end. Follow the steps to add Unallocated space to C drive.
Besides shrinking, extending, moving and copying partitions, NIUBI Partition Editor helps do many other disk and partition management operations.