Why do you want to shrink volume?
The computer doesn’t have a perfect disk partitioning when it starts to use. The size
of all the partitions will not accept as time goes by, even they are perfect at the
first time. Thus, you have to resize it till you are satisfied with. Some of them,
you want to extend because they are not big enough, while some of them, you would
like to shrink to get a good performance.
Sometimes, you need to shrink the partition for creating a new one to store your
personal files. Or you may want to shrink one partition to extend another one. Yes,
you could shrink a partition in order to get a better use of the whole space.
How to shrink a volume?
To shrink volume, there are many methods. You can use the Windows Disk Management to
get an interface performance, or use the Diskpart to shrink volume at the command
prompt with syntax. But how to shrink volume with CMD?
To use Diskpart, you need to open the command line prompt first. Click Start, type
“cmd” to find the cmd program, right click it and select “Run as Administrator”, or
press “WIN+R”, type “cmd” and press Enter. Type “diskpart” to open the diskpart
Then, you can type the syntax to shrink volume, like the following steps.
Type: list volume. You should remember the number of the volume you want to
Then, type select volume n to select the volume you want to shrink.
Type shrink desired=size to shrink the selected volume. And you will shrink
volume successfully with Diskpart.
However, you may be warned by a shrink error. Which means you may meet some troubles
when you shrink volume.
There may be some unmovable files like the paging file or the shadow copy storage
area, which are not automatically relocated and you cannot decrease the allocated
space beyond the point where the unmovable files are. So you can only shrink the
partition to the unmovable file point. If you need to shrink more space, you need
move the unmovable files to anther disk or delete it. If there are number of bad
clusters detected, you cannot shrink the partition too. Besides, Diskpart can only
shrink/extend volume with NTFS file system, so, if your file system is FAT, the
Diskpart shrink cannot use.
Fortunately, AOMEI Partition Assistant 6.6 Edition can replace Diskpart to shrink
volume easier, and it can overcome all the troubles we mentioned above.
Alternative to Diskpart - AOMEI Partition Assistant
You can take the advantage of the freeware AOMEI Partition
Assistant Standard, which can help you shrink volume/partition to the minimum
size with the obstruction of the unmovable file with an intuitive GUI. You can
operate with mouse-clicking. And, it is totally free. Here you can follow the
Step 1. Free download this software, install
it to your computer installed Windows 10/8/7, launch it. Right-click the
partition/volume you want to shrink, select Shrink Partition.
Step 2. Then, you can shrink volume/partition by dragging the bar or
remount the volume. Click OK.
Step 3. Here you can see the pending operations and if it is no
problem, click Apply to submit the task.
If you prefer to use command line to shrink volume, you can install AOMEI Partition
Assistant Professional on your Windows PC. It supports more advanced features
than AOMEI Partition Assistant Standard, including Command Line. Here you can learn
how to shrink volume with command line of AOMEI Partition Assistant.
1. To use AOMEI partassist.exe, you need to run cmd as
administrator. Then, type cd C:\Program Files \AOMEI Partition Assistant Pro
Edition 6.6 (cd+ installation directory of AOMEI Partition Assistant),
press Enter. Then, type partassist.exe /list and
It will turn to AOMEI Partition Assistant command line and list all disk on your
2. Type partassist.exe /list:1 and press Enter. It
will choose the disk 1 and list all volumes on the selected disk.
3. Here you can type the command partassist.exe /hd:1 /resize:0
/reduce-left:10240 in the following screenshot, press
*You can adjust the parameters to make another shrink. For example,
if you would like to shrink the specified partition to create an unallocated space
on its right side, use “right” to replace “left”.
4. It will move and resize partition at the following window. When the progress
reaches 100%, type exit to quit the program.
● "/hd" followed by disk number, which starts with 0.
●"/resize" followed by partition number or drive letter, and the partition
number starts with 0. If the specified value is drive letter, disk number can be
● By default, the specified size is in MB, and GB is also available.
Besides, you can use command line to extend
partition too. With the command line, you can resize your partition in a simple