Disk Management is built-in tool in Windows 8 which can help the users manage
partitions to optimize the performance of their computers. It is an improvement of
Microsoft Management Console which enables the users to manage hard disk without
downloading or paying for any software.
- Extend and shrink volume
- Create, delete and format volume
- Convert basic disk to dynamic disk
- Add or change drive letter
- Convert MBR disk to GPT disk or GPT to MBR
- Convert dynamic disk to basic disk
- Mark partition as active
- You cannot extend OS partition if there is no contiguous unallocated space on
the right side of OS partition. In such case, the "Extend Volume"
option will be grayed out in the disk management console.
- You cannot extend OS partition by shrinking data partition behind it. Because
"Shrink Volume" feature only generates unallocated space on the right
side of the partition you shrink.
- You cannot convert MBR disk to GPT disk or GPT to MBR before you delete all the
- You can not shrink the partition to the size of minimum.
Windows 8 Disk Management built-in "Shrink Volume" feature supports to
reduce partition size and generate unallocated space. Can you redistribute the
unallocated space to any partition within Windows inbuilt disk management? Let us
check it step by step.
Step1: Right-click "Computer", select "Manage"
and then click "Disk Management" in "Storage" folder to open
Windows 8 Disk Management. Right click on the volume which you want to shrink and
select "Shrink Volume" as below:
Step2: In the pop-up window, enter the amount of space to shrink.
Then you can preview an unallocated space behind D drive. When you right click on it,
you can only see "New Simple Volume" that allows you to create a new
There is another way to shrink hard drive partition in Windows 8: shrink volume in
Windows 8 via CMD. It is an advanced partition manage tool. If you cannot shrink
volume in Disk Management, you may try to do that using Diskpart in Command
How to shrink volume Windows 8 in CMD?
1. Type “cmd” in search box and find CMD program. Right click it and select “Run as
2. In the Command Prompt, type following commands and press Enter after each
You may get an error indicates that you cannot complete the shrink in Windows 8. This
is because there are some unmovable files like page file and hibernation file locate
in the middle of the volume. In that case, you can turn to AOMEI Partition Assistant
Standard, the free partition shrink software, to shrink volume
The new generated unallocated space is always on the right side of the partition in
Windows 8 disk management. However, the "Extend Volume" can only extend
the partition that has an unallocated space behind it. So the unallocated space
which is not next to C drive can't be added to system partition.
AOMEI Partition Assistant, as a magic partition software for windows, has many
powerful and versatile features to manage disk partition safely and easily. As for
the unallocated space, wherever its locations, AOMEI can move it to any partition.
With the help of it, you can extend your C drive freely. Free Download AOMEI Partition
Assistant Standard Edition (File Size: 7.65 MB)
Tips: AOMEI Partition Assistant is also fully compatible with
the latest Windows 8.1, and the steps of shrinking volume in Windows 8.1 are the
same as those to shrink volume in Windows 8. What’s more, it also can work on
Windows 7, Vista, XP, 2000.
Before you do:
- Make sure there is unallocated space on your disk, if there is no, you can
resize partition to get unallocated space
- If there are other applications running on the partition which you are going to
perform, AOMEI Partition Assistant will notice you to close those applications
or to execute this operation in PreOS
Step1: Install and launch AOMEI Partition Assistant Standard
Edition. This is the main interface and you can see before the operation the size of
C drive is 128.73GB.
Step2: Right click the partition (here's C) which you want to
extend and select "Merge Partition".
Step3: In the pop-up window, click C drive and the unallocated
space. Click "OK".
Step4: Click "OK". You can see C drive has been extended
to 248.03GB . Please click "Apply" to commit the operations.
From the above, we can make conclusion that Windows 8 Disk Management has some
limitations , it allowing shirking partition to create new volume only, but can't
add the unallocated space the partition that not next to it. However, with the help
of AOMEI Partition Assistant, you can add unallocated space to C dive easily to get
rid of the annoying warnings of low disk space error and improve the performance of
In addition, this partition software can help you migrate OS to SSD, make bootable
CD, create/delete/format partition, resize/move partition. So AOMEI Partition
Assistant maybe the wise choice to make the best use of disk space.