Merge Partitions in Windows Server 2012 (R2) without Data Loss

April 13, 2016

Actually, you can merge Windows Server 2012 (R2) partitions to adjust partition size without losing data when you are not allowed to extend partition with Disk Management due to the extend volume greyed out.

About Partitions Merging in Windows Server 2012

Merge partitions refers to combine unallocated space or a partition into the specified partition which you expect to add more free disk space. A lot of Server 2012 users may need this operation when one of their partitions is in low disk space, especially the system partition; or there are so many partitions on hard disk which is hard to manage and plan to reduce the number of partitions.

How to Merge Partitions in Windows Server 2012?

If you suddenly realize a partition is in low disk space, the thing you have to do is extending partition to avoid the bad influence coming from it. The following are the ways for you.

Disk Management

Disk Management is a built-in tool in Windows Server 2012, which is able to extend partition, shrink partition, convert MBR disk to GPT and so on. But with this tool to extend partition, there must be contiguous unallocated space behind the partition required to extend, otherwise the extend volume will be grayed out as the following picture shows and you can't extend partition.

Extend Volume Gray out

AOMEI Partition Assistant Server

AOMEI Partition Assistant Server is a professional software for partition management. It enables users to merge partitions without worrying there is contiguous unallocated space or not and merge partitions with no data loss. This function is easy for you to expand the space of partition.

Before you do

  • This operation may change the original location of your data, so we suggest you to learn How to Safely Partition before executing this operation.
  • Only 2 partitions can be merged at one time, and the two partitions must be adjacent. However, you can merge one or more unallocated space into a partition. The unallocated space just need to be behind or in front of the partition, whether it is adjust to the partition or not.
  • Data partition can be merged into system boot drive; however, system boot drive can’t be merged into data partition.
  • "System Reserved" partition could not be merged.

Merge two partitions into one

Step1: Download, install and launch AOMEI Partition Assistant Server. Click the partition you want to extend (eg. partition C) and then choose Merge Partitions.

Merge Partition into a Partition

Step2: Select a partition (the partition should be adjacent to the partition you choose in step1) you plan to merge into partition C and then click OK.

Choose Partition E

Step3: In the pop-up window, click Apply to perform all the operations.


Merge unallocated space into a partition

Step1: Open this software, click the partition you are going to merge and then select Merge Partitions.

Merge Unallocated Space

Step2: Choose unallocated space in the following window and then click OK to go on.

Choose Unallocated Space

Step3: To execute all the operation, please click Apply.

Click Apply

Besides merge partition in Windows Server 2012, AOMEI Partition allows you to migrate OS to SSD, make bootable CD, convert primary partition to logical, convert dynamic disk to basic and more useful features.