Resize/Extend RAID Partition in Windows Server 2012

Many servers are built with hardware RAID arrays such as RAID 1, 5, or 10. In general, RAID 1 is used for the operating system and programs. If one of the disks fails, it can be swapped quickly without server downtime. After the RAID array is built, the size of the virtual disk is fixed. Is it possible to resize RAID virtual partitions without losing data? The answer is yes. This article introduces how to resize a RAID partition in Windows Server 2012/2016/2019/2022 with a built-in tool and safe partition software.

Resize RAID Partition with Disk Management

Windows' built-in Disk Management has "Shrink Volume" and "Extend Volume" functions to help resize allocated partitions. However, both functions have many restrictions. It can only help you decrease an NTFS partition to create a new volume, or extend an NTFS partition by deleting its adjacent partition on the right. It cannot extend a partition by shrinking another one. There is another built-in Diskpart command tool. Although it works in a different way, it has the same restrictions as Disk Management.

Restrictions of built-in tools to resize a RAID partition in Server 2012/2016/2019/2022:

1. They can only resize NTFS partitions.
2. They cannot shrink a partition beyond the point where unmovable files are located.
3. They can only shrink a partition to the left and create unallocated space on the right to create a new volume.
4. They cannot extend a volume after shrinking another one on the disk.

Better Way to Shrink/Extend RAID Partition on Windows Server

With partition editor software, there are no such restrictions, and it is much easier. You can shrink the RAID partition that has plenty of free space, and then merge the unallocated space into another partition on the same RAID array.

To the operating system and NIUBI Partition Editor, there is no difference whether you use a physical disk or a hardware RAID array. All you need to do is drag and drop on the disk map. The operating system, programs, and associated settings, as well as everything else, remain exactly the same as before.

Download NIUBI Partition Editor and follow the steps in the video to shrink/extend a RAID partition in Windows Server 2012/2016/2019/2022:

There is a potential risk of system and data damage while resizing a physical/RAID partition on a server. You'd better back up or clone the disk first and run safe disk partition software. Compared with other software, NIUBI Partition Editor features innovative technologies to make it much safer and faster, such as:

• Hot Clone - Clone disk partitions in Windows for backup, migration, and fast disk swapping.
• Virtual Mode - All operations are listed as pending for preview, and real disk partitions won't be modified until you click "Apply" to confirm.
• Cancel-at-Will - If you applied incorrect operations, you can safely cancel the ongoing operations at any stage before completion.
• 1 Second Rollback - If any error is detected while resizing partitions, it can immediately and automatically revert the disk partitions to their previous state.
• Advanced File-Moving Algorithm: Resize and move partitions 30% to 300% faster, saving significant time, especially when handling a large number of files.

RAID Array Virtual Disk Partition Resizing - Tips

There are several tips you should know before resizing/extending a RAID partition in Server 2012 R2/2016/2019/2022:

• Do not break the RAID array or perform any operations on the RAID controller.
• There is no difference when repartitioning a RAID array compared to a VMware/Hyper-V virtual disk.
• Free space can only be transferred on the same physical disk or logical RAID array.

If there is not plenty of available free space on the same disk or RAID array, no software can add space from another separate disk. In that case, you can copy the disk/RAID to a larger disk/RAID and extend the partition with the extra disk space. Watch the video:

Besides shrinking and extending physical/RAID partitions on Windows Server 2012/2016/2019/2022, NIUBI Partition Editor helps you perform many other disk partition management operations.

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