Extend partition Server 2008

Extend disk partition for Windows Server 2008

When any data volume or system partition C is getting full, you can extend disk partition without reinstalling OS. This page shows 3 ways to extend partition on Windows Server 2008 (R2) easily and safely.

Extend partition Server 2008

To extend disk partition for Server 2008, the native Disk Management cannot help you, because it cannot combine two partitions together or extend a volume by shrinking another one. You need reliable disk partition tool for Windows 2008 Server. There are many choices in the market, but NIUBI Partition Editor is the first choice. Because it provides unique 1 Second Rollback technology to ensure system and data intact, virtual mode to avoid incorrect operations, Hot-Resize technology to help extend server partition on the fly, Cancel-at-will technology to cancel unwanted but ongoing operations. In addition, its advanced file-moving algorithm helps extend disk partition much faster than other tools.

NIUBI Partition Editor has 3 options to help you expand disk partition on Server 2008 without losing data, select the one that fits for your disk partition configuration.

Way 1 – extend partition by merging

By merging partitions, free space in a partition (such as D:) will be transferred to another adjacent drive (such as C:), so there will be enough free space in drive C again. At the meantime, all files in drive D will be transferred into C automatically. To do this, you just need 3 clicks.

How to extend partition on Windows Server 2008 by merging:

Download NIUBI Partition Editor, right click drive D and select “Merge Volume”.

Merge volume

In the pop-up window, click the check-box of both C and D drive, and then select C drive in the drop-down list.

Select drive

Click OK and back to the main window, C drive is extended to 70GB by merging D, click Apply to execute, done.

Drive D merged

Tip NIUBI Partition Editor is designed to work in virtual mode, you can undo and redo the pending operations before clicking Apply.

Caution Do NOT merge drive D into C if you installed programs in it, otherwise, the shortcuts of the programs will stop working, although these files are moved into C.

Way 2 – extend partition by shrinking

If you want to extend partition C for Server 2008, there is better way by shrinking other data volumes. Free space in D or other volume will be converted to Unallocated space after shrinking. All files in this volume keep intact during this operation. Unallocated can be transferred and converted to part of free space in C drive.

Steps to extend partition on Windows Server 2008 by shrinking:

Step 1 Right click drive D and select “Resize/Move Volume”:

Resize volume

Drag the left border rightwards to shrink it in the pop-up window. You may also enter an amount in the box behind “Unallocated space before” (1024MB = 1GB).

Shrink D

Click OK and back to the main window, 20GB Unallocated space is generated behind C drive.

Unallocated created

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

Partition C is extended in virtual mode, click Apply to take effect.

Partition C extended

If there is not plenty of free space in drive D, you can shrink other nonadjacent partitions in the same disk. You just need an additional step to move Unallocated space.

Watch the video how to extend disk partition for Server 2008:

Way 3 – extend partition by copying

Most of disk space issue can be fixed by following the steps above, but in some special situations, you need to extend partition by cloning to a large disk, for example:

  • C drive is full but there is no other partitions in the same disk.
  • Both drive C and D are almost full.
  • The hard disk for Operating System is very small.

By cloning to a larger disk, all partitions can be extended with the extra disk space.

Step 1 Right click the disk that containing C drive and select Clone Disk, or click Clone Disk Wizard above.

Clone disk

Step 2 Select the destination disk and click Next.

Caution The destination disk should be blank and NIUBI will ask you to delete all partitions in this disk. If there are valuable files in the destination disk, remember to transfer or back up files first.

Select disk

 Drag and drop to edit partition size and location. To extend partition C, you need to edit drive E and D one by one.

Edit partitions

Click Next and back to the main window, all  partitions in Disk 1 are extended. (This operation requires server rebooting to complete.)

Partitions extended


  1. Click the option to turn off computer after click Apply to execute.
  2. Change the boot order in BIOS and boot from the destination disk.

In Summary

This article introduces 3 methods to extend partition on Windows Server 2008 (R2). The first one is better for data partitions, the second is better for most of common disk partition configuration, the third one is for small and full disk.