How to Convert MBR to GPT on Windows Server Without Data Loss

How to Convert MBR to GPT without Data Loss on Windows Server

Converting MBR to GPT is one thing, but knowing how to convert MBR to GPT on a Windows server without losing data is another. GPT stands for Globally Unique Identifier Partition Table, while MBR is Master Boot Record. Normally, it's impossible to transition between the two without deleting existing partitions through diskpart.

However, GPT is more reliable than MBR and has other advantages. Indeed, Microsoft recently announced that its new Windows 11 operating system will support only the UEFI/GPT partition style, making GPT even more attractive. Other significant benefits of GPT include:

• Larger disk capacity: MBR supports a maximum of 2 TB, whereas GPT can handle up to 256 TB.
• More partition slots: MBR is limited to four primary partitions, while GPT offers 128 primary partition slots.
• Firmware support: GPT uses the UEFI interface instead of the BIOS-type used by MBR.

Thus, the process of converting MBR to GPT on Windows Server without losing data is crucial, and that's what this guide explains. Keep reading!

Backup data before converting MBR to GPT

When it comes to converting MBR to GPT on a Windows server without losing data, the first thing to do is back up your data. We already know that it's impossible to change MBR to GPT when there are partitions existing. Plus, unexpected issues might occur during the conversion process.

Having a backup eliminates the stress of worrying about anything going wrong. An efficient and straightforward method is by using a third-party tool like Todo Backup Enterprise. For a step-by-step guide, you can refer to this page for assistance:

How to Convert MBR to GPT

Learn the methods to convert MBR to GPT on Windows Server without data loss. Meanwhile, find the best solution that supports Windows Server 2003, 2008 (R2), 2012 (R2), 2011, 2016, and 2019.

Method 1: Use an MBR to GPT Converter Tool (Recommended)

Although there are several different ways to convert MBR to GPT, using a third-party application is the best option. These can easily convert MBR to GPT without deleting disk partitions/volumes and without losing data on your Windows Server.

We recommend using third-party software, such as the AOMEI Partition Assistant Enterprise. It's not only the easiest tool for the job, but it's also compatible with all Windows operating systems.

See how to convert a Windows server from MBR to GPT without losing data using the Partition Master tool:

Step 1. Download and run the Partition Master tool on your computer.

Step 2: Launch the disk converter, select “Convert MBR to GPT”, and click “Next” to proceed.

Step 3. Select the MBR disk that you want to convert to GPT, and click "Convert" to start the conversion.

Aside from being a simple solution to convert MBR to GPT without data loss on Windows Server, the Partition Master tool offers other features such as:

- Optimize disk storage with resize, split, format, extend, and create partitions without data loss. - Expand system partitions to resolve low disk space issues. - Partition recovery protection to revert partitions to their previous state. - Support for Windows Server 2003, 2008 (R2), 2012 (R2), 2011, 2016, and 2019. - 24/7 free technical support and consultation available.

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

Step 1: Press the Windows key + R to open the Run dialog box, type cmd, and then press Enter to launch the Command Prompt.

Step 2. Type diskpart at the command prompt and press Enter to launch the built-in DiskPart tool.

Caution: Make sure you back up all important files and programs before continuing.

Step 3: Remove all partitions on the MBR disk/partition. You can use the command CLEAN ALL in the Command Prompt menu to delete all stored data.

4. Type `list disk` and press Enter. This will display all available disks. Browse through the list and select the disk you want to convert to GPT.

5. Assuming that "Disk 1" is the MBR disk you want to convert, type `Select Disk 1` and press Enter. DiskPart will let you know that Disk 1 is now selected.

6. Type convert gpt and press Enter to confirm. Wait for a few seconds, and you'll see the message "DiskPart successfully converted the selected disk to GPT."

Method 3: Convert MBR to GPT Using Disk Management

Step 1: Press Windows + R to open the Run dialog box, then type diskmgmt.msc. Press Enter, and Disk Management will open.

Step 2. In the Disk Management console, scroll to the MBR disk you want to convert. Right-click on each partition and choose the Delete Partition/ Delete Volume option. The Disk Management tool will not display the Convert to GPT Disk option otherwise.

Step 3: There should be unallocated space on the disk now. Right-click on it and select the "Convert to GPT Disk" option.

Select the “Convert to GPT disk” option:

Step 4. Proceed to create new volumes/partitions on the GPT disk. You might also want to restore from a backup device (if you had one before starting the conversion process).

Conclusion

Now you may know why we recommend using Partition Master to convert MBR to GPT without losing Windows Server data. It's not only easy to use, but also doesn't require you to delete all partitions on the disk.

Depending on your choice, you might need to consider other methods. But before proceeding with any of these, remember to back up all important data.

Frequently Asked Questions (FAQ) on Converting MBR to GPT on Windows Server

If you have more questions about converting MBR to GPT on a Windows Server computer, follow and find the answers below:

< strong > 1. Can I Convert MBR to GPT Without Losing Data?

Yes, you can directly convert MBR to GPT without data loss using a third-party disk conversion tool. AOMEI Partition Assistant and its MBR to GPT Disk Converter feature can help you successfully change the disk partition style from MBR to GPT without losing any files on the disk.

2. How to convert MBR to GPT without Windows?

When the Windows operating system is installed on your disk, you need to make sure that your computer's operating system and motherboard support the GPT disk type and UEFI boot mode.

If so, you can use disk conversion software like Partition Master to change the OS disk from MBR to GPT without running into boot issues or system failures. The only thing to remember is that if you're running Windows 11, you'll need to have UEFI boot mode enabled.

3. Can I convert from MBR to GPT without losing data? Can I do this in Server 2012 R2?

Launch AOMEI Partition Assistant Enterprise on your Windows Server 2012 R2. Click "Disk Converter", then choose "Convert MBR to GPT". Next, confirm the operation by selecting "Execute * Operation(s)" and click "Apply".