How to Convert MBR System Disk into GPT on Windows Server 2012 (R2)?

August 18, 2017

It is not easy to convert MBR system disk to GPT without losing data on Windows Server 2012; but AOMEI Partition Assistant can help you to realize this goal effortlessly and safely.

MBR VS GPT for Windows Server 2012 (R2)

There are two partition styles applied on disk: MBR (master boot record) and GPT (GUID partition table). The former employs the standard BIOS partition table and the latter applies UEFI (unified extensible firmware interface), originated from EFI. With different partition style, GPT and MBR disks perform totally dissimilarly in many aspects.

  • A MBR disk only supports 2 TB volumes at most and a GPT disk can supports up to 256 TB.

  • A MBR disk just supports 4 primary partitions or three primary partitions plus one extended partition; as for GPT disk, it permits you to create 128 primary partitions at most.

  • What’s more, a GPT disk owns a backup of the partition table at the end of the disk; when the original one is damaged, it can be restored with the backup.

As a GPT disk owns so many advantages, it is advisable to convert MBR disk to GPT in Windows Server 2012.

How to convert MBR system disk into GPT Server 2012(R2)?

It is an easy task to convert MBR disk into GPT if the disk is unallocated. You can convert MBR to GPT on Windows Server 2012 through Disk Management according to the following process:

Enter Disk Management by pressing “Windows + R” and typing “diskmgmt.msc”, right click the disk that you want to convert, and choose “convert to GPT disk”. Then, the MBR disk will be quickly converted to GPT in Windows Server 2012 (R2).

It is still not difficult to convert MBR disk into GPT if the MBR disk is an allocated data disk.

When the option of “convert to GPT disk” is grayed out, you just need to delete all partitions on the disk. Then you can convert the disk from MBR to GPT. If there are important data, you need to make backup before deleting partitions.

However, you are not allowed to convert a disk that contains Windows Server 2012 via Disk Management as Windows doesn’t permit you to delete partition that contains operating system.

At this time, it is advisable to apply proper third party software to convert MBR system disk to GPT in Windows Server 2012 (R2).

Great MBR to GPT converter

Nowadays, although there is a great number of software that can assistant you to convert MBR system disk into GPT on Server 2012 (R2), AOMEI Partition Assistant Server is one of the most reliable and safe software. It can not only change non-system disk to GPT, but also convert MBR system disk to GPT without losing data in Windows Server 2012 (R2). What’s more, itis also possible to convert GPT to MBR with this great MBR to GPT converter. With high compatibility, apart from Windows Server 2012 (R2), AOMEI Partition Assistant Server is suitable for Windows Server 2003/2008 (R2) as well.

Convert MBR to GPT without losing data Server 2012 (R2) with AOMEI Partition Assistant

In order to employ AOMEI Partition Assistant Server on Windows Server 2012 (R2), you have to install it and launch it.

Notice:

  • In advance of converting MBR to GPT, it is recommend to backup Windows Server 2012 (R2) and important information just in case of accidents caused by wrong operations.

  • Ensure that your motherboard support UEFI/EFI; otherwise, your system will be unable to boot after converting.

The step-to-step guide for converting MBR to GPT style is as follows:

Step 1: To convert MBR system disk to GPT Server 2012, right click the disk that you need to convert to GPT style and choose “Convert to GPT Disk”. Then, click “OK”.

Convert to GPT Disk

Step 2: Carefully read the information on pop-up window, make sure that your motherboard support UEFI/EFI and click “Yes”.

Motherboard Support EFI or UEFI Boot

Step 3: Confirm the pending operation and click “Apply” to convert MBR system disk into GPT on Windows Server 2012. Then click “Proceed”.

Convert MBR to GPT

Tips:

  • For converting system disk from MBR to GPT, reboot is required.

  • In order to enable system bootable, it is necessary to enter BIOS and change Legacy to EFI/UEFI after converting MBR system disk to GPT.

  • Do not forcibly terminate the program, otherwise the data may be incomplete or interrupted.

Verdict  

From all above, we can conclude that AOMEI Partition Assistant can convert MBR system disk to GPT disk into GPT on Server 2012 (R2) without any efforts. Just within simple three steps, the conversion from MBR to GPT is implemented. AOMEI Partition Assistant is both a fine converter for GPT and MBR and a good partition manager for Windows Server 2016/2012 (R2)/2008 (R2)/2003. It offers many helpful functions such as convert FAT32 to NTFS, resize partition and merge partition. What’s more, it is able to clone hard drive to another hard drive and migrate OS to SSD or HDD. All in all, it is strong and credible software that can save a great number of time and energies for you.