How to Check Disk Drive Partition Style in Windows 11

What is a Disk Drive Partition Style?

A partition style, either Master Boot Record (MBR) or GUID Partition Table (GPT), is the scheme that records where partitions start and end on a drive. It also decides how the firmware finds the operating system at boot. Knowing which one you have tells you whether the drive works with newer Windows features or only with older systems.

In short, MBR goes with legacy BIOS boot and is limited to about 2 TB per drive. GPT goes with UEFI boot and handles much larger drives. Windows 11 expects the GPT and UEFI combination on the system drive.

Why Check Your Partition Style?

Checking the partition style shows whether a drive meets the Windows 11 requirements. If the system drive is still MBR, you will need to convert it before Windows 11 will install or run in the supported way.

Moving an older MBR layout to GPT also lets you use drives larger than two terabytes. It also lets the PC boot with UEFI, which is what security features such as Secure Boot depend on.

Method 1Using the Windows Settings App

This is the quickest route on a current Windows 11 build. If a page in these steps is missing, you are probably on an early Windows 11 build. Use Method 2 instead.

1. Open Settings by pressing Windows key + I.
2. Click System on the left.
3. Select Storage.
4. Expand Advanced storage settings.
5. Click Disks & volumes. You should see a list of the physical disks in the PC.
6. Select your drive and click Properties. A page with details for that disk opens.
7. View the Partition Style at the bottom. It reads either GPT or MBR.

If you have more than one drive, repeat the steps for each. A PC can have a GPT system drive and an MBR data drive, and the two do not affect each other. The same steps work on Windows 11 Home and Pro.

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Method 2Using Disk Management

Disk Management shows every disk, including ones that have no drive letter. It is the most reliable graphical option and is available in both Home and Pro.

1. Right-click the Start button and select Disk Management. The Disk Management window opens.
2. Locate your disk (e.g., Disk 0) in the lower pane. Use the disk label on the left, not one of the partition blocks to its right.
3. Right-click the disk label and select Properties. If you right-click a partition instead, you get a different menu without this option.
4. Click the Volumes tab to see the Partition style. It shows either GUID Partition Table (GPT) or Master Boot Record (MBR).

Close the Properties window when you are done. Nothing is changed unless you pick a command from the right-click menu and confirm it.

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Method 3Using the Command Line

Using PowerShell

Method 3: Using the Command Line. PowerShell gives you a quick text view of your disks, which is handy over a remote session or when you want to check several drives at once. The following command shows your disk details:

Look through the output for the partition style of each disk. Each disk is listed on its own line or block, so match the disk number to the drive you care about.

Get-Disk

Using Command Prompt ⚠️ Requires Admin Privileges

You can also check from an elevated window with the steps below. The window must be opened as administrator, otherwise the disk tool will refuse to start or return an error.

1. Search for cmd, right-click it, and select Run as administrator. Approve the User Account Control prompt if one appears.
2. Type diskpart and press Enter.
3. Type list disk and press Enter. A table of your disks appears.

If the table has a GPT column, a drive that uses GPT shows an asterisk (*) in it. A drive with nothing in that column uses MBR.

diskpart

Conversion Pathways and Troubleshooting

Older drives running the MBR format need to be converted to GPT before they can meet the Windows 11 requirements. Built-in utilities handle this change without formatting the drive.

The conversion tool works on the system drive. After a successful conversion, the PC must also boot in UEFI mode, so you will usually need to switch the firmware from legacy BIOS (or CSM) to UEFI in the firmware settings. If you skip that step, the PC will not start from the converted drive.

Summary

You can check the disk partition style in Windows 11 using built-in tools: the Settings app, Disk Management, or the command line. All three give the same answer, so pick whichever you find easiest.

Finding out whether your drive uses GPT or MBR helps you prepare for major system upgrades, install new operating systems, or fix boot errors on your computer.

Can I convert MBR to GPT without losing data?

Always perform a full backup of your files first. Converting a non-system drive may require reformatting, which erases all data on that drive.