Why resize partition using Diskpart?
Partition on hard drive is like clapboard in system, programs and personal files.
System and software will run well if the hard drive has only one partition, normally
C. However, well-partitioned hard drive helps us more on data managing. After
purchasing a PC, you will find it is partitioned to three volumes C, D, E in
general. However, the system drive C usually is not enough to hold all your users
data and programs. In Windows 7, the C drive should be larger than 40 GB on the
condition that you won’t install software there. It is when you will need Diskpart
to resize partition.
Surely, resize includes shrink and extend two aspects. When one of the partitions is
too big, you can use Diskpart to shrink
partition to make full use of it in Windows 7/10/XP, create another new
partition for instance. Other than resizing partition on hard drive, the partition
on USB flash drive may also need to be changed. Anyway, you may have other reasons
to resize hard drive partition. Now follow this article to learn how to change
partition size in three ways.
Resize NTFS partition via Diskpart in Windows 7
Diskpart is one of the built-in partition tools in Windows, which is an embedded
product that needs to be used under Command Prompt. Take extend NTFS partition for
example and there should have one unallocated space on its right side. Press Windows
key + R key at the same time to start Run box.
Type cmd and press Enter
key to start Command Prompt.
Input Diskpart.exe and press Enter.
Input list volume and press Enter.
Input select volume x (x is the volume number you want to extend)
and press Enter.
Input extend size=10240 (size stands for the capacity you will
extend by and the unit is MB) and press Enter.
Input exit and press Enter.

In most instances, Diskpart will extend the volume successfully. Nevertheless, it
will encounter errors like “extend volume may not be extended” sometimes when there
are unmovable files in the volume. In addition, Diskpart won’t allow you to resize
system partition as well as FAT-based volume. As a result, when you want to extend
partition in Windows XP or resize system volume, it is better to ask powerful third
party partitioning software, AOMEI
Partition Assistant Professional for example.
AOMEI Partition Assistant provides partassist.exe utility for its users to partition
hard drive from Command Prompt. You can operate it as operate Dikspart yet get more
advanced features. In detail, this tool supports Windows 10/8.1/8/7/XP and Windows
Vista. Also, it allows you to resize system partition and FAT/FAT32/FAT16/NTFS-based
volumes. More importantly, it will reallocate the unmovable files without damaging
them in order to resize volume. Download it freely
to have a try.
Use Diskpart alternative to resize partition in Windows 7
Download and install AOMEI Partition Assistant. Repeat the same steps to start
Command Prompt.
Input cd + installation directory of AOMEI Partition Assistant. e.g. cd
C:\Program Files (x86)\AOMEI Partition Assistant Pro Edition 6.0 to start
partassist.exe and press Enter.
Input partassist.exe /list to list all volumes and press Enter.
Again, it is important that you know exactly which drive letter you will extend
or shrink.



Notes:
"/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 ignored.
The value of "/extend" can be left, right, auto or specified
size.
If you input partassist.exe /list /usb, you are allowed to do all the
operations on USB drive.
For more command line use of partassist.exe, please refer to how to use AOMEI Partition Assistant command lines.
To sum up, partassist in AOMEI Partition Assistant does offer much more advanced
functions than Diskpart on resizing partition in Windows 7/10/XP. This alternative
to Diskpart actually has graphical user-interface as well. So for those users who
aren’t get used to command prompt operations, this user-friendly interface saves
much troubles. Steps to extend Windows 7 system partition are
easy and simple. Take add unallocated space to system drive for example.
Extend OS partition with graphical interface of AOMEI Partition Assistant
Step 1. Start AOMEI Partition Assistant. Right-click boot drive C and
select Merge Partitions.

Step 2. Check C drive as well as the unallocated space and clickOK.

Step 3. Preview the virtual result and click Apply.

Tip: It will complete the task after reboot.
Words in the end, there are many methods to achieve the goal and all you need to do
is to choose the most convenient one. Diskpart do have the function of resizing
partition, but if you need more advanced features, AOMEI Partition Assistant is the
best choice. From the last three screenshots, you may find this software can perform
many other operations. For example, you can realize BYOD by installing
Windows 10 on external hard drive. Besides, it is considerable to create one
bootable media just in case.