Extend C drive

Extend C drive on Windows Server 2016 without losing data

C drive is the partition where Operating System running from, so you’d better pay more attention when doing something about it. The same with previous versions, C drive in Windows Server 2016 also runs out of space. The fastest way to solve this problem is extending C drive with Free or Unallocated space in this disk.

However, some people feedback disaster while doing this. In this article, I’ll show you how to extend C drive partition on Windows Server 2016 without losing data.

Extend C drive

Be caution of system and data

When system C: drive is running out of space, if you use traditional way to back up, recreate partition and restore, it may waste a whole day. As I said above, the fastest way is extending C drive. However, there is system and data damage risk if you resize and extend disk partition. Some unreliable partition software is called as “data killer” by the people who have experienced such disaster.

Disk drive

This is a model of a MBR style hard disk, as you see, the disk, partition and files are working like a chain. GPT style disk is much better but the strategy to manage files are similar. To locate and modify a file, Operating System will read the parameters in this disk to locate the partition, then locate the files list, finally locate the data area of this file.

For example, when you shrink drive D to extend partition C, the partition software should modify all parameters of both partition. Furthermore, all files in drive D will be moved to new locations, so all parameters of these files must be updated, too. Any incorrect modification causes partition corruption and/or data loss.

In fact, besides software internal error, some hardware issue such as power outage cause part of the parameters failed to be modified, or files failed to be moved. If it happens, you cannot boot Windows or lose files permanently.

The first thing to extend C drive in Windows Server 2016 is backing up and running safe disk partition software. You have backup, but it costs such a long time to restore and verify data if damage occur, server is offline during this period.

Which tool to extend C drive on Server 2016

Among the partition software for Windows Server, NIUBI Partition Editor is highly recommended, because it provides 3 ways to protect system and data.

Virtual Mode

NIUBI Partition Editor is designed to work in virtual mode. The operations you do won’t be executed immediately. Instead, they’ll be listed as pending on bottom left, you can preview or click Undo to cancel any unwanted operations. Real disk partitions won’t be modified until you click Apply button to confirm.

Cancel at will

Other server partition manager don’t allow you cancelling the ongoing operations even if you did something wrong, because the cancellation causes part of the parameters unable to be modified, then damage occur. But while running NIUBI you can cancel the ongoing operations at any progress without losing data.

1 Second Rollback

NIUBI Partition Editor provides unique 1 Second Rollback technology to ensure system and data intact. If any software or hardware issue occur while resizing disk partition, it automatically reverts the server to original status in a flash. If it happens, nothing will be changed or lost. This is innovation in Disk Management industry.

Besides system and data safety, keeping online is also important to a server. NIUBI has additional benefits when you extend C drive in Windows Server 2016:

If any software error or hardware issue occur during repartitioning disk drive, it automatically reverts the computer to original status in a flash like nothing happened.

It is common to do something wrong or unwanted, to avoid mistake, NIUBI is designed to work in its own virtual mode. The operations you do will be listed as pending for preview and real disk partition won't be changed until you click Apply to confirm.

If you did something wrong but have applied the operations, with the help of Cancel-at-Will technology, you can cancel the ongoing operations without losing data.
The unique file-moving algorithm helps you move and resize partition 30% - 300% faster than any other partition tools.

Then how to extend C drive partition on Windows Server 2016 without losing data?

Solution 1 Extend C partition by shrinking D

In most of the server machines, there is another drive D in the same disk, so you can shrink D to get Unallocated space and then add into C drive. By doing this, everything keeps the same after resizing.

Download NIUBI Partition Editor, you’ll see all separate partitions and disk with graphical partition configuration on the right side. Available operations to the selected disk or partition display on the left side.

NIUBI main window

Step 1 Right click drive D and select “Resize/Move Volume” feature, drag the left border rightwards in the pop-up window.

Shrink D

Click OK, 20GB Unallocated space is produced behind C drive.

Drive D shrank

Step 2 Right click C drive and select “Resize/Move Volume” again. Drag the right border rightwards to combine the Unallocated space.

Extend C drive

Click OK, partition C is extended to 50GB.

C drive extended

As you see, there are two pending operations on bottom left, click “Apply” on top left to start extending.

Solution 2 Get free space from nonadjacent partition

If there is not enough free space in the adjacent drive D, you can get free space from any other partitions in the same disk. In this situation, you just need 1 additional step to move Unallocated space from right side of D to the left.

Tips To move the Unallocated space, drag the middle position toward the other side.

Move Unallocated

If you still do not understand, watch the video how to shrink partition and extend C drive in Server 2016:

In Summary

It is very easy to resize and extend partition C in Windows Server 2016, but because of system and data damage risk, you’d better use safe partition software. Thanks to the powerful data protection and fast moving ability, NIUBI Partition Editor is the best tool to accomplish this task.

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Extend C drive partition on Windows Server 2016 without data loss.
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