When system C: drive is running out of space, you can increase its partition size without reinstalling Operating System and applications. When there is free unused space in other partition on the same disk, you can add these space to expand C drive. This article introduces how to extend C drive partition in Windows Server 2019 without losing data.
Windows Server 2019 native Disk Management utility has built-in Shrink Volume and Extend Volume functionalities to help re-size allocated partition. However, this native tool cannot extend C drive by shrinking D or other drives. Unallocated space that shrunk from D is nonadjacent to C drive, so Extend Volume is greyed out when you right click C drive.
You can get adjacent Unallocated space by deleting drive D to enable Extend Volume for C drive, but in most of servers, programs and some Windows services are installed to this partition, so you cannot delete it. In addition, under some particular environment, you still cannot extend C drive after deleting D.
Two points you should know before extending system partition in Server 2019:
Disk partition software is called as data killer by the people that experienced such disaster. Many people don't know about this risk.
Why there is such kind of risk? To be short, all parameters of associated disk, partition and files must be modified correctly when resizing disk partition. Some software internal error and hardware issue such as power failure could cause part of the parameters failed to be modified. If it happens, system and/or data will be damaged. So besides backing up the server, it is also very important to select a safe partition software, otherwise, it costs a long time to restore everything. In addition, server is offline during this period.
Better than other disk partition tools, NIUBI Partition Editor is much safer and faster because of the advanced technologies:
In most of servers, there's free unused space in other data partition(s) on the same disk, you can shrink the one with plenty of free space, then part of free space will be changed to Unallocated and all files keep intact. Finally add Unallocated space to C drive, then there will be more free space in C drive again. In this way, Operating System, programs and anything else keep the same with before. To accomplish this task, you just need to drag and drop on the disk map.
Download NIUBI Partition Editor and you'll see the main window with disk partition structure and other information on the right. Available operations to selected disk or partition are listed on the left and by right clicking. Unavailable operations are hidden automatically to keep interface clean.
Steps to extend C: drive partition in Windows Server 2019:
As I said above, there must be available free space on the same disk, then what to do if the system disk is almost full? In that case, no software can expand C drive by taking free space from another different/separated disk. However, you can solve this problem by copying disk to a larger one. Follow the steps in the video to extend C drive partition in Windows Server 2019 by copying:
As you see, additional space can be added to C drive and other partitions. Note: you should start from the last one to move and extend partition.
If you run Windows Server 2019 as guest virtual machine in VMware, Hyper-V, Virtualbox or other tool, there's no difference when there's available free space on the same virtual disk. You just need to install NIUBI Partition Editor to the virtual machine and follow the steps in the first video above.
If the virtual system disk is almost full, you can expand it with VMware or Hyper-V. After expanding disk, additional space is shown as Unallocated on the end.
To extend system partition C in Windows Server 2019, firstly check your disk partition structure and configuration, then follow the corresponding method above. Remember to make a backup and run safe partition software. Because of the advanced data protection technologies, NIUBI Partition Editor is the best choice to accomplish this task. Besides shrinking and extending partition, it helps do many other operations for your server.