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How to Convert MBR to GPT without Losing Data Windows Server

Updated by Daisy on Feb 14, 2022
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How to convert MBR to GPT without Losing Data Windows Server

Converting MBR to GPT is one thing but knowing how to convert MBR to GPT without losing data windows server is another. GPT stands for GUID Partition Table and MBR is Master Boot Record. Conversion between the two is usually impossible without having to delete the existing partitions through diskpart.

However, the GPT is more reliable and possesses other advantages over the MBR. Microsoft even just officially announced that the Windows 11 OS requires only a UEFI/GPT partition style. That makes the GPT even more desirable. Other standout benefits of the GPT are:

  • Higher Disk Capacity: the MBR can only support a maximum of 2TB compared to the 256TB capacity of the GPT.
  • More Partition Slots: the maximum of 4 primary partitions of the MBR is lower than the 128 primary partition slots of GPT.
  • Firmware Support: the GPT uses a UEFI interface over the BIOS type for the MBR.

Therefore, the process of how to convert MBR to GPT without losing data window server is essential and that’s what this guide explains. Keep reading!

Back-Up Data Before Converting MBR to GPT

Backing up your data is the first step on how to convert MBR to GPT without losing data windows server. We already learned that changing MBR to GPT is impossible when there are still partitions. Besides, you might encounter unexpected problems during the conversion process.

Having a backup saves you the stress of worrying that nothing goes wrong. An effective and easy way is to use a third-party tool like the EaseUS Todo Backup Enterprise.

How to Convert MBR to GPT

Learn how to convert MBR to GPT without losing data windows server. Also find the best method that supports Windows server 2003, 2008 (R2), 2012 (R2), 2011, 2016, and 2019.

Method 1: Use MBR to GPT Convert Tool (Recommend)

Although there are different alternatives to converting MBR to GPT, the use of a third-party application is the best. Rather than having to delete disk partitions/volumes, they easily convert MBR to GPT without losing data windows server.

The EaseUS Partition Master Enterprise is our recommended choice of such third-party software. Asides from being the easiest conversion tool, it is also compatible with all Windows OS.

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See how to convert MBR to GPT without losing data windows server on the EaseUS Partition Master:

Step 1. Download and launch EaseUS Partition Master on your Windows computer.

Step 2. Right-click the MBR disk that you want to convert and choose "Convert to GPT".

convert MBR to GPT - 1

Step 3. After that, find and click the "Execute 1 Operation" button on the toolbar and choose "Apply" to start the conversion.

convert MBR to GPT - 2

Asides from serving as a simple solution on how to convert MBR to GPT without losing data windows server, the EaseUS Partition Master offers other features like:

  • Optimize disk storage and resize, split, format, extend, create and erase partitions without data loss.
  • Extend system partition to tackle low disk space issues.
  • Partition recall protection to the previous state.
  • Supports Windows server 2003, 2008 (R2), 2012 (R2), 2011, 2016, and 2019.

Method 2. Convert MBR to GPT on Windows Server Using CMD

Step 1. Use the Windows + R command and enter cmd in the resulting dialogue box. Press Enter to open the command prompt.

Step 2. On the command prompt, type diskpart and hit Enter to run the in-built DiskPart tool.

type diskpart and hit Enter

Note: Verify you have done a backup of all essential files and programs before proceeding to the next step.

Step 3. Delete all disk/volume partitions on the MBR drive. You can use the CLEAN ALL command to erase every stored data from the cmd menu.

Step 4. Input “list disk” and click Enter. All available disks will display. Navigate and choose the ones you wish to convert to GPT.

Step 5. Assuming “Disk 1” is the MBR disk to be converted, type “Select Disk 1” and press Enter. The DiskPart tool will notify you that Disk 1 has been selected.

Step 6. Type convert gpt and press Enter to submit. Wait for a few seconds and a display message will appear saying “DiskPart successfully converted the selected disk to GPT format”.

convert GPT

Method 3. Run Disk Management to Convert MBR to GPT

Step 1. Enter disk management by pressing Windows + R and typing diskmgmt.msc in the dialogue box. Press Enter and the disk management tool will open.

run disk management

Step 2. From the Disk Management environment, scroll to the MBR disk you need to covert. Right-click on the different partitions and choose the Delete Partition/ Delete Volume option. Without that, the disk management tool will not display the Convert to GPT disk option.

choose the Delete Partition

Step 3. The disk should now be left with only unallocated space. Right-click on it and choose the Convert to GPT disk option. 

choose the Convert to GPT disk option

Step 4. Proceed to create new volume/disk partitions on the GPT drive. You can also consider restoring from a backup device (provided you did backup before starting the conversion process).

Conclusion

You probably now understand why the EaseUS Partition Master is our recommended method on how to convert MBR to GPT without losing data Windows server. Not only is the use straightforward, but also it does not involve deleting disk partitions.

Depending on your choice, you might consider the other methods. However, remember to back up all vital data before commencing such processes.

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About the Author

Updated by Daisy

Daisy is the Senior editor of the writing team for EaseUS. She has been working in EaseUS for over ten years, starting from a technical writer to a team leader of the content group. As a professional author for over 10 years, she writes a lot to help people overcome their tech troubles.

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  • 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. I also think the overall look and feel of EaseUS Partition Master Free makes whatever you're doing with your computer's partitions easy.

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  • Partition Master Free can Resize, Move, Merge, Migrate, and Copy disks or partitions; convert to local, change label, defragment, check and explore partition; and much more. A premium upgrade adds free tech support and the ability to resize dynamic volumes.

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  • It won't hot image your drives or align them, but since it's coupled with a partition manager, it allows you do perform many tasks at once, instead of just cloning drives. You can move partitions around, resize them, defragment, and more, along with the other tools you'd expect from a cloning tool.

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