By Cherry / Last Updated April 2, 2022

The Windows built-in tool Diskpart is a command-line program designed for disk management. The user can type the syntax to perform the corresponding action on the disk on Windows 11/10/8/7. This article mainly introduces you how to use Diskpart convert MBR.

Brief introduction of MBR and GPT

MBR is the abbreviation of mater boot record. It uses the standard BIOS partition table. It only supports up to 4 primary partitions on the disk, if you want to create more partitions, you have to convert one of the primary partitions into extended partition, so that you can create more logical partitions inside. Besides, MBR disks only support up to 2TB hard disk, if you want to use a larger disk, MBR is not recommended.

GPT is the abbreviation of GUID partition table disk. It uses the extensible firmware interface (EFI). It supports more than 4 partitions on a disk, and it can break the limitation of 2TB hard drive size. Now, many users want to use GPT because of its unique features. However, sometimes, you need to convert GPT disk to MBR disk. For example, the Windows 95/98/ME, Windows NT4, Windows 2000, Windows 2003 32bit and Windows XP 32bit don’t support GPT partitions, the GPT disk will not be recognized until you convert it to MBR disk.

MBR VS GPT

How to use Diskpart convert disk from GPT to MBR

After figuring out what is MBR and GPT, do you want to know how to convert GPT disk to MBR disk with Diskpart?

First, you need to press "Windows + R" and type "cmd" to open Diskpart.

Then, you can use the syntax to convert disk to MBR. Here we take an example of converting disk 1 to MBR disk:

Type “list disk” and press Enter. Here will list all the disks on your computer. Remember which one is the disk you need to convert.
Type “select disk 1” and press Enter to select the disk.
Type "clean" and press Enter. If this is an empty disk without any partitions on, you can skip this step.
After selecting the disk, type “convert mbr” and press Enter, it will convert the GPT disk to MBR disk.

Convert MBR

Warning:
It seems very easy to convert GPT disk to MBR disk. Actually, you can also convert MBR to GPT. But you need to know that you can only convert a disk from GPT to MBR only when the disk is empty and contains no volume. If there are any data or volumes on your disk, backup your data and delete partitions or volumes before converting it.

Free alternative to DiskPart convert MBR without deleting partitions

Converting GPT to MBR, or MBR to GPT via DiskPart or Disk Management will meet the same problem that you must delete all existing partitions on the selected disk. Otherwise, the conversion will fail. Here we recommend you a free tool: AOMEI Partition Assistant Standard. It can convert disks between MBR and GPT without deleting partitions or any data. What'more, it provides a graphic user interface which is easier to use for users who have no computer experience.

Download Freeware Win 11/10/8.1/8/7/XP
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Tip: Standard Version support to convert data disk between MBR to GPT. You can convert the system disk from GPT to MBR, or MBR to GPT after upgrading to Professional Edition.

Step 1. Install and launch this partition manager. After open it, right-click the GPT disk, select Convert to MBR Disk at the menu.

Convert to MBR

Step 2. Then, it will pop up a window to ask you if you are sure to convert disk from GPT to MBR disk. Click OK to move on.

MBR OK

Step 3. Finally, the disk has changed into MBR, but you need to click Apply on the toolbar to submit the pending operations.

MBR Apply

 If you need to convert the boot disk without OS, you can first create a bootable media and finish the conversion in WinPE environment. However, after converting the boot disk, you have to enter BIOS to change the boot mode from Legacy to UEFI, or UEFI to BIOS so that you can boot from the system disk successfully.

Summary

Compared with using DiskPart convert MBR, the AOMEI Partition Assistant Standard is much easier and simpler, because it can help you finish the work without losing data even you are a non-technician.

Apart from the MBR and GPT conversion, it also allows you to convert dynamic disk to basic without losing data, convert primary and logical partition without losing data, transfer OS to SSD, and so on.