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

Daisy updated on Dec 11, 2020 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, which helps you create, resize, clone, move, merge, and format partitions. The following video tutorial shows you how to create, deleted, shrink, and resize partition with this powerful disk management program.

Favored by millions of users. It contains all features Diskpart has and many other superior functions, like the two demonstrated below. 

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 feature and guides:

Note: The operation of migrating OS to SSD or HDD will delete and remove existing partitions and data on your target disk when there is not enough unallocated space on the target disk. If you saved important data there, back up them to an external hard drive in advance.

Step 1. Run EaseUS Partition Master, select "Migrate OS" from the top menu.

select migrate os

Step 2. Select the SSD or HDD as the destination disk and click "Next".

Warning: the data and partitions on the target disk will be deleted. Make sure that you've backed up important data in advance. If not, do it now.

Then click "Migrate" to continue.

select the destination disk

Step 3. Preview the layout of your target disk. You can also click the disk layout options to customize the layout of your target disk as you want. Then click "Proceed" to start migrating your OS to a new disk

preview the lay out

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.


Step 1: Launch EaseUS Partition Master on PC

Click on "Partition Recovery" at the top of the main window.

Run EaseUS Partition Master for partition recovery

Step 2: Select a hard disk to search for the lost partition(s)

Choose the hard drive disk or SSD where you lost partitions, and click "Scan".

Run EaseUS Partition Master for partition recovery

Step 3: Wait for the scanning process to complete.

This program will scan the whole disk with two modes - "Quick Scan" and "Deep Scan" to find all lost partitions and data for you.

  • Quick Scan will find your latest or recently deleted partition at a fast speed.
  • Deep Scan will scan and find more and earlier deleted partitions. 
  • If the Quick Scan doesn't find your lost partition, wait patiently till the Deep Scan completes.
Scan lost partitions

During or after the scan, you can double-click the partition marked as "Deleted" to check and view the partition content. If it contains your lost partition data, go to Step 4 and continue. 

Check lost partition contents

Step 4: Select and recover lost partitions

1. Select the lost partition, marked as "Deleted" with previous Labels, capacity etc, and click "Proceed" to continue.
2. Click "Recover Now" to confirm and restore the lost partition.

Scan lost partitions

3. Click the "Execute Operation" button and click "Apply" to restore lost partition.

Scan lost partitions


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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Video Tutorial

How to Partititon a Hard Drive on Windows 10/8/7

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