As with previous versions, the system C drive often runs out of space in Windows Server 2019 and 2022. When this happens, many server administrators look for a reliable solution to increase C drive space without losing data. Shrinking an existing partition to expand another is simple, but if the entire disk is full, the solution depends on your disk configuration. This article introduces how to safely increase disk space in Windows Server 2019/2022 without losing data.
How to Increase Disk Space of the C Drive in Windows Server 2019/2022
When the primary C drive is getting full in Windows Server 2019/2022, first check if there is available free space within other volumes on the same disk. If so, this problem can be resolved easily by resizing partitions.
However, resizing partitions carries inherent risks of system damage and data loss. Therefore, it is highly recommended to back up your server in advance and use safe partition software.
Compared to other tools, NIUBI Partition Editor provides advanced data protection technologies to secure your server:
- Cancel-at-will - if you applied wrong operations, you can cancel the ongoing tasks at any progress before they finish.
- Advanced file-moving algorithm - shrink, move, and copy partitions 30% to 300% faster.
- 1-Second Rollback - if it detects any known error while resizing partitions, it automatically reverts the server to its original status in a flash.
- Virtual Mode - all operations are listed as pending for preview, and real disk partitions won't be modified until you click "Apply" to confirm.
- Hot Clone - clone disk partitions without server interruption. You can clone the system disk regularly as a backup. Whenever the system disk is down, you can boot from the clone disk directly without wasting time to restore.
In most cases, there is free space in other data partitions on the same disk. You can shrink one of these partitions using NIUBI Partition Editor to get Unallocated space. After you add this Unallocated space to C drive, your server will have plenty of free space again. Operating system, programs, and everything else keep the same as before.
Steps to increase disk space of C drive in Windows Server 2019/2022 safely:
- Download NIUBI Partition Editor, right-click the adjacent drive D:, and select "Resize/Move Volume". Drag the left border rightward in the pop-up window to make Unallocated space on the left.
- Right-click the system C: drive, select "Resize/Move Volume" again, and drag the right border rightward to combine this Unallocated space.
- Click Apply on the top left to confirm and execute.
- If you want to get free space from a non-adjacent partition, you need an extra step to move Unallocated space next to the C drive. Follow the steps in the video above.
- As long as there is free space on the same disk, there is no difference whether you use SSD, mechanical HDD, hardware RAID arrays, or run the server as a virtual machine in Hyper-V/VMware.
How to Increase Disk Size in Windows Server 2019/2022
If the entire disk is full, no software can add space to C drive from another separate disk. In this case, choose the corresponding method below according to your disk configuration.
To Single Physical Hard Disk (HDD or SSD):
The size of a physical disk is fixed. A 500GB disk cannot be increased to 1TB. When the disk is full, you can clone the disk to a larger one and extend partitions with extra disk space.
To Hardware RAID 1:
If your RAID controller has the ability to rebuild RAID 1 without losing data, you can copy the original RAID 1 to one of the larger disks, and then rebuild the RAID 1 array. Otherwise, you need to build a new RAID 1 with two larger disks and clone the original RAID to the new array. The steps remain the same as cloning a physical disk linked above.
To Hardware RAID 5 and Other:
If your RAID controller supports expanding RAID 5 without losing data, you can either add a new disk or replace existing disks with larger ones. After rebuilding the array, the additional space is shown as Unallocated space at the end. Then, you can move and merge Unallocated space to the C drive.
How to Increase Virtual Disk Space for Windows Server 2019/2022 Virtual Machines
If you run Windows Server 2019/2022 as a virtual machine, you can expand the virtual disk size directly without cloning.
- Learn how to increase virtual disk size in Hyper-V instances.
- Learn how to increase virtual disk size in VMware guest environments.
After expanding the virtual disk, the additional space will be also shown as Unallocated space at the end of the disk. Then, follow the steps above to add Unallocated space to C drive.
Besides increasing disk space and resizing partitions in Windows Server 2025/2022/2019, as well as 2016/2012/2008/2003, this reliable server partition software provides a comprehensive toolkit to scan bad sectors, convert partition types, disk partition clone, erase data, merge partitions, and much more.
© 2009 - NIUBI Technology All Rights Reserved. |