How to Mirror MBR HDD to GPT HDD in Windows Server 2012 (R2)?

August 24, 2017

The focus of this chapter is how to mirror MBR HDD to GPT HDD in Windows Server 2012 (R2) with the disk mirroring software AOMEI Partition Assistant Server.

The situations you need to mirror MBR HDD to GPT HDD in Windows Server (R2)

There are two partition styles of disk, MBR disk and GPT disk. For some reasons, you need to replace the MBR HDD with GPT HDD in Windows Server 2012 (R2).  

Overview of MBR and GPT

This article will introduce you the difference between MBR disk and GPT disk.

MBR, the short of master boot record, is a partition style that was originally developed for x86-based computer systems and is by far the most common style in use at present. In terms of MBR disks a master boot record partition is required. MBR disk supports up to 2TB capacity, and you can create up to 4 primary partitions. If you need more partitions, you can convert one primary partition to extended partition, so that you can create more than 4 partitions on the MBR disk.    

GPT, the short of GUID partition table, is another partition style that was originally developed for 64-bit Itanium based systems. On GPT disks, EFI system (ESP) and Microsoft Reserved (MSR) partitions must be present in order for the disk to be bootable. GPT disk breaks out many limitations of MBR. Such as the 2TB hard drive capacity, and the mount of primary partitions - GPT disk allows you to create up to 128 primary partitions on the disk.  

Why you need to mirror MBR HDD to GPT HDD?

As the difference between MBR disk and GPT disk, you may change your MBR HDD to GPT HDD. For example, if your Windows Server 2012 (R2) hard drive keeps filling up (2TB), you may want to upgrade it to a larger HDD. While GPT HDD supports the hard drive capacity more than 2TB. However, you do not want to abandon the old data on the MBR HDD. Thus, mirror MBR HDD to GPT Server 2012 should be the best way to keep the old data on the new GPT HDD. Well, how to mirror MBR HDD to GPT HDD in Windows Server 2012 (R2)?      

The best HDD mirroring software for Windows Server 2012 (R2)

To mirror MBR HDD to GPT HDD in Server 2012 (R2), you need to make use of an HDD mirroring software. And AOMEI Partition Assistant Server should be the best one. It is designed for Windows Server 2003, 2008 (R2), 2012 (R2), and the newest Windows Server 2016. it also supports all Windows PC operating systems. With AOMEI Partition Assistant Server, mirroring MBR HDD to GPT HDD in Windows Server 2012 should be a simple thing.   

Detailed steps for mirroring MBR HDD to GPT HDD Server 2012 (R2)

AOMEI Partition Assistant Server allows you to mirror MBR HDD to GPT HDD in Server 2012 (R2) directly. Here are the detailed steps of how to mirror an MBR data HDD to GPT HDD in Windows Server 2012 (R2).

Before you do, you need to prepare a larger GPT HDD, connect it to your computer, make sure it can be detected.   

Step1. Install and launch AOMEI Partition Assistant Server. It will show you the basic environment of your hard drive(s) on your computer. To mirror MBR HDD to GPT HDD on Server 2012 (R2), here you should right click the MBR HDD, select Copy Disk.

Copy Disk

Step2. It will bring you to the disk copy wizard, here you can choose Copy Disk Quickly, or Sector by Sector Copy. PS: if you choose Sector by sector copy, the AOMEI Partition Assistant will convert MBR to GPT in Windows Server 2012 (R2) first, then, start copy.

Copy Method

Step3. Select the GPT HDD as the destination disk, click Next.

Destination Disk

Step4. Then, you can edit the partitions' size on the destination disk. Or you can resize Windows Server 2012 partition latter with AOMEI Partition Assistant Server.   

Edit Disk

Step5. It will give you a note for how to boot from the cloned partition, considering this is just cloning an MBR data HDD to GPT HDD, here you can ignore it, click Finish.

Note

Step6. You will back to the main interface, click Apply at the toolbar to submit the whole progress.    

Apply

Mirroring boot and system volume disk from MBR to GPT on Windows Server 2012 (R2)

Mirroring MBR data HDD to GPT HDD on Windows Server 2012 (R2) is a such a simple work. However, what if you need to mirror boot and system volume disk from MBR HDD to GPT HDD on Windows Server 2012 (R2)?

AOMEI Partition Assistant Server also supports you mirror boot and system volume disk from MBR to GPT on Windows Server 2012 (R2). But you need to know:

● Windows 32bit system does not work on a GPT disk. Thus, if your system is 32bit, the operation is unable to continue. You need to upgrade your system to 64bit. Then, you can mirroring boot and system volume disk from MBR HDD to GPT HDD on Windows Server 2012 (R2).

● Make sure that your motherboard supports EFI/UEFI.

Then, you can do as the above steps. But here, you need to pay attention to the Note in Step5.

Finally, change the boot mode so that you can boot from the GPT disk after mirroring.  

Conclusion

Mirror MBR HDD to GPT HDD in Windows Server 2012 (R2) with AOMEI Partition Assistant Server should be a simple thing. Besides, it is a great software that you can use to convert MBR disk to GPT in Windows Server 2003, 2008 (R2), 2012 (R2), 2016, and all Windows PC OSes.