By Michael / Last Updated September 23, 2021

In the present time of information explosion, storage capacity requirements become bigger and bigger. Especially those server deals with big data need a hard disk, the bigger, the better. People may configure a hardware RAID container in the past, but instead a few hard disks now. Because a hard disk can be achieved 4TB/8TB today.

With the advent of a hard drive larger than 2TB, many users will want to use a partition larger than 2TB. But not all machines support a partition larger than 2TB at the beginning. There must make some changes.

The most fundamental concept of partitioning schemes is MBR and GPT. The MBR is an old-style which has limitations that allowing the only partition sizes less than 2TB and only four primary partitions. The GPT is new and has been developed to overcome these limitations imposed by the MBR.

So the first thing you should change is converting MBR to GPT if you want to make your partition size larger than 2TB. And according to the announcement of Microsoft, Windows 11 system can only boot in UEFI mode if you want to upgrade to Windows 11, you'll have to use a GPT disk.

If the disk you want to convert is an installed system, please make sure that your system firmware is using UEFI (Unified Extensible Firmware Interface). The GPT boot function is available on your computer or server. And your Windows operating system must be one of the following:

  • Windows Server 2012 and 2012 R2

  • Windows Server 2008 and 2008 R2 (32-bit or 64-bit)

  • Windows 8 (64-bit)

  • Windows 7 (64-bit)

  • Windows Vista (64-bit)

  • Windows 11

Windows XP will not do, neither 32-bit nor 64-bit. When everything is ready, we can start converting MBR to GPT.

There are two ways to convert MBR to GPT. One is with diskpart command, another is with third-party partition software.

Here I want to focus on the third-party way, with the help of AOMEI Partition Assistant Server Edition.

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Convert System Disk To Gpt

AOMEI Partition Assistant is a professional partition tool. With its “Convert to GPT Disk” function, you can convert MBR to GPT with fewer steps and won’t cause data loss.

After you have converted your disk to GPT, you can extend your partition to larger than 2TB now. You can still use AOMEI Partition Assistant. The difference is using another function - “Extend Partition Wizard”.

Extend Partition Wizard

AOMEI Partition Assistant is an all-in-one partition software.It has many other great functions such as Migrate OS to SDD, Creat Windows 8 To Go, etc. I hope you will download and enjoy it. If you income any question, please don’t hesitate to write to our support staff. Certainly, you may find answer on our website.