How to Manage Partitions with Disk Partition CMD in Windows 10?

Daisy posted on Apr 24, 2020 to Partition Manager | How-to Articles

"Unable to select a drive, as it is showing 0 MB while installing Windows 10, I tried to check-in cmd, but I don't know its instructions. Can I get the cmd guide or other software?"
Are you confused about how to use disk partition cmd? Don't worry. We know what you want to know. In the following, this page lists many practical tips about cmd. And we recommend a third party software - EaseUS Partition Master that can replace the cmd function.


1. Overview of disk partition cmd
2. How to use disk partition cmd in Windows 10
3. How to manage partitions with EaseUS Partition Master
4. FAQ

Overview of disk partition cmd

Cmd, the abbreviation for command, is a Microsoft Windows command that opens the Windows command line window.
Notes: Windows 95 & 98 users can only enter the command line by entering command; other Windows users can enter command or cmd to use.

How to open Windows cmd

Method 1: You can input cmd in the Start Menu search bar to open the Windows Command Prompt.
Method 2: You can press Win+R to open the Run box, type cmd, and press Enter.

What is Diskpart

After open cmd, you need type 'dispart' for disk partitioning. Diskpart is a command-line utility in Windows 10, which enables you to operate disk partition by using Dispart command prompt, including create, merge, extend, shrink, format, delete, wipe disk partition and other features.

How to use disk partition cmd in Windows 10

Steps to create a partition in Windows 10 using command prompt.
Warning: Do not use the Diskpart until a full backup.

Step 1: You can use the two methods mentioned above to open the command prompt or Run window.
Step 2: Enter Diskpart
Steps about essential partition functions are as follows:

  • Create a partition using Diskpart

1. At the Diskpart prompt, type: List Disk 
2. Input: Select Disk * (* represents the disk number)
3. Type: Create partition primary size=*(* means the partition size.) 
4. Input: Assign letter=* (* represents Choose a drive letter not already being used.)
5. Type: Exit (Exit is the Esc on the top left of the keyboard.)

create partition diskpart

  • Extending a partition using Diskpart

Note: If you try it or any other method, make sure you have a full backup.
1. Verify that contiguous free space is available on the same drive and that free space is next to the partition you intend on extending, with no partitions in between.
2. Type: Select Disk * (Selects the disk.)
3. Type: Select Volume *(Selects the volume.)
4. Type: Extend Size=*
5. Type: Exit

extend partition diskpart

  • Deleting a partition using Diskpart

Note: You cannot delete an active system or boot partition or a partition with a dynamic page file.
1. Input: Diskpart.exe
2. Select disk *
3. Select Partition *
4. Delete partition
5. Exit

  • Wiping a disk using Diskpart

This operation deletes all data on the disk.
1. Type: Select disk *
2. Type: Clean all(The CLEAN ALL command removes all partition and volume information from the hard drive being focused on.)
3. Exit
The diskpart also has other features, such as assign drive letter, shrink partition, mark partition as active, convert MBR/GPT. If you want to learn these parts, FAQ, at the end of the article, will bring you the right answer.
After reading the above guide, I believe you have a specific understanding of how to use cmd via Diskpart in Windows 10. Cmd is a powerful tool, but it is not suitable for a beginner. Misoperations can easily cause partition problems. There is a better software -- EaseUS Partition Master.

How to manage partitions with EaseUS Partition Master

EaseUS Partition Master is an all-in-one partition manager, favored by millions of users. It contains all features Diskpart has and four superior functions. 
1. Disk migration and cloning
Nowadays, for better performance of computer disk, you may want to migrate the operating system and clone disk to the target one. It saves the user's time to download programs. It only takes a few steps to get remarkable results. For example, there is a guide about "transfer Windows 10 to a new hard drive(HDD/SSD)".

The Migrate OS part:

migrate os


2. Partition Recovery
Partition Recovery is a practical feature targeting for your lost partitions.
It is worth trying to scan your selected disk. The spending time of a deep scan may in line with your disk volume.
You can check the related article about "recover unallocated space in Windows 10" to get further learning.

partition recovery

3. View disk properties
Check your partition size with intuitive pictures. You can figure up disk allocation quickly.

disk property

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 Windows 10 is supported


1. How do I use diskpart command in Windows 10?
-Boot into Windows 10
-Press the Windows key and C to open the charm bar.
-Type cmd
-Click Command Prompt
-When Command Prompt opens, type diskpart
-Press Enter

2. How to assign drive letter via Diskpart?
--Type "assign letter=F" (F can be replaced with another letter that has not been used yet).
--And then, you will receive a message says: DiskPart successfully assigned the drive letter or mount point.

3. How to shrink partition via Diskpart
Type shrink directly will automatically shrink the partition by Windows, and you can also type shrink desired=*** to define your partition size.
(Such as: Type "shrink desired=10240". And then, you will receive a message says: DiskPart successfully shrunk the volume by 10GB.)
Note: You can reduce the size of a volume only if it is formatted using the NTFS file system.

4. How to mark a partition as active via Diskpart?
--Type active.
--And then, you will receive a message says: DiskPart marked the current separation as active.

5. How to clean Disk/convert a disk to GPT/ convert a disk to MBR?
-Type: list disk.
-Type: select disk 1.
-Type: clean.
-Type: convert gpt or convert mbr.


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Frequently Asked Questions

Why Choose EaseUS Partition Master?

"I've used Partition Master Professional many times to create, delete, format, move, rename, and resize partitions."PCWorld

"Partitioning tools have come a very long since the days of complicated command line utilities and EASEUS Partition Master is one of the most advanced programs available."TECH ADVISOR

"I love that the changes you make with EaseUS Partition Master Free aren't immediately applied to the disks. It makes it way easier to play out what will happen after you've made all the changes."Lifewire

Will the "Migrate OS" feature transfer the Windows system files only or the whole C drive?

To ensure that the migrated system will boot normally, the Migrate OS feature will transfer all the files in the system and the boot partitions. Generally, the boot partition is the C drive so the transfer will include all the files in C.

Does EaseUS Partition Master license apply to multiple computers?

The license of Partition Master Professional and Server editions can be used on 1 computer only, while that for for the Technician and Unlimited editions can be used on multiple machines.

What is the difference between EaseUS Partition Master Trial version and the Free version?

Free is for home users only, with most basic functions available such as partition resize and clone. While trial can help you understand how this product works and test what a full license can do on a business or server OS machine.

Will it cause any data loss after resizing the partition in EaseUS Partition Master?

Generally, it will not cause any data loss or boot issue by resizing a partition. However, in order to protect your data, we suggest that you backup the partition before resizing, in case of any unexpected situations such as power outages, computer hardware failures, etc. You can use EaseUS Todo Backup to backup the partition and its trial version is fully functioned for 30 days.

What should I prepare before resizing the partition?

On the partition that is going to be operated, there might be some files being occupied by other programs. To ensure a successful operation, we suggest that you close all the unnecessary software before resizing that partition. Otherwise, EaseUS Partition Master will detect the partition being locked by the other software and require a reboot to resize the partition under boot mode.

About EaseUS Partition Master

All-round disk & partition management software for personal and commercial use. Let it manage your storage drive: resize, format, delete, clone, convert, etc.