How to Increase Mirrored Volume Easily?

December 23, 2014

Due to mirrored volume has so many advantages, it attracts a lot of people. As we all know, the low disk space problem is always happened, so does the mirrored volume. This article will introduce how to increase it easily, so, please read on.

For some computer users, dynamic disk may seem to be better than basic disk, while for others, basic disk is their favorite. No matter what kind of disk we use, each disk has its own characteristic. Today, our topic is about how to increase mirrored volume of dynamic disk.

About mirrored volume

A lot of people converting basic disk to dynamic is because of the advantages in mirrored volume. It owns the ability of taking use of several discontinuous spaces, and writing, deleting or removing data simultaneously. What attracts most users is the fault-tolerant capacity. When there is something wrong with reading the disk, it still can work, and a new one will replace it automatically.

As we all know, each coin has two sides. Although the mirrored volume brings so much convenient, it still has some disadvantages. It can not do the task of compression and dilatation with Windows Disk Management. Meanwhile, only two disks can create new one, and it waste a lot of disk space. The read-write speed also can not be improved.

How to increase mirrored volume easily?

We always encountered the problem of low disk space. How about the mirrored volume? Generally speaking, the disk management in Windows 7/8 has the function of extending, but it only works for simple volume. Thus, a powerful partition manager is needed. Among these excellent tools, Partition Assistant enjoys a good reputation, and its Pro Edition can manage both dynamic and basic disk better. Now, let's see the detailed steps to extend the mirrored volume H: by releasing unallocated space from I drive!

Step 1: Download Partition Assistant Pro Edition and start it. You will see the main interface. Then, please launch the Dynamic Disk Manager.

Main Interface

Step 2: Right click I: in disk 3 to choose "Resize/Move Volume", and then, do as the picture do to free some unallocated space.

Resize Volume

Step 3: Choose the same selection of H: in disk 3. Then, drag H: as the picture do.

Extend Volume

Step 4: Please remember to click "Commit" to hand in the task.


  1. Please ensure there are two dynamic disks, because mirrored volume only works on two dynamic disks.
  2. Windows XP and Windows Vista do not support mirrored volume.
  3. Please make sure all the data has been backed up, because the operating system will reboot.