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How to expand C: by shrinking drive D:

All disk partitions are allocated while building the Server or PC, but things are changing, original partition size may not fit for your needs, the typical example is that system C: drive is full or running out of space. Originally, you have to start over, backup, delete, recreate and restore, what a annoying and time-consuming work. Especially for a server, no one bear it offline for one more minutes.

Then is there an easier and faster way to solve this problem? Yes, shrink D: and expand C:.

In Windows 2003 Server, there is no built-in tool to shrink a partition. In Windows Server 2008, you can shrink and extend partition in Disk management or diskpart command, but due to the limitations, you cannot extend C: drive by shrinking D:.

I suggest you change partition size with server partition software, such as Acronis Disk Director, Partition Magic Server, Aomei Partition Assistant, etc.

How to shrink D: drive

Open disk management and check disk layout, the aim is shrink D: to smaller and expand C: to larger.

Disk management

Step 1: Launch Partition Assistant Server, you'll see all disks and partitions and other properties of each partition.

Partition assistant

Right-click drive D: and select "Resize Partition", in the pop-up window, drag the left border rightwards.

Drag left to shrink

Shrink partition

There will be some free Unallocated space created at the end of C: drive.

Free space created

How to expand C: drive

Step 2: Right-click C: drive and select "Resize Partition", in the pop-up window, drag the right border rightwards to hold the Unallocated space.

Resize to extend

Extend c drive

Click OK, in the main window, you'll find that partition D: shrank and drive C: expanded.

Partition resized

Click 'Apply' on top left to proceed resizing operation.

Apply resizing

In the pop up window, you'll see the pending operations.

Pending to resize

If there is no mistake, click 'Proceed', within several minutes, partition resizing completed. Check in disk management.

Partition resized

Is it indeed easy to shrink D: and expand C: drive? lol

You can only extend a drive by shrinking other partitions on the same disk, no partitioning software has the ablity to resize partitions between two physical hard disks.

In conclusion, you just need to drag and drop on the disk map to shrink drive D: and get some free Unallocated space, and then extend C: drive with this space. No need to format, reinstall or doing anything else. It is amazing if you close the open files in the partitions you want to shrink and extend before running this program, you can change partition size in Windows without server offline.

Pay attention to data security

No matter you want to shrink D to expand C or shrink other partitions, all partition resizing operations will change the parameters of disk partitions, so you'd better select a reliable partition software, no one wants to see data loss or boot failure and make things worse.

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