It is necessary to convert MBR to GPT
MBR and GPT are two different partition tables of disks. Compared with MBR disk, GPT
disk has many advantages, and you may think it is necessary to convert MBR to GPT in
the following situations.
1. MBR disk supports 4 primary partitions. If you need more partitions, you can only
change one primary partition to extended partition, which allows you to create more
logical partitions on the hard drive. While GPT disk allows you to create up to 128
2. MBR disk supports disk capacity up to 2TB, while GPT disk breaks out this
limitation. If your 3TB hard drive only shows 2TB in Windows Disk Management, you may need to
convert to GPT to use the hard drive fully.
3. When you install Windows OS on hard drive, you may meet the problem that the
“Windows cannot be installed on this disk. The selected disk has an MBR partition
table.”. because on EFI systems, Windows can only installed on GPT disks. When you
meet this problem, you can convert the disk from MBR to GPT first, and then, install
There are many situations that need you to convert MBR to GPT. If you want to keep
the data on the hard drive after converting, using Gptgen in Windows 10/8/7 to
convert MBR disk to GPT disk should be a good method.
Using Gptgen to convert MBR to GPT on Windows 10
As it mentioned, in those specific situations, you need to convert MBR partition
table to GPT. But how to do it? Here you can make use of the Gptgen tool that can
help you convert MBR to GPT while retaining everything on the disk.
Introduction of Gptgen
Gptgen, a simple command line tool for converting hard drives partitioned according
to the MS-DOS - style “MBR” scheme to the GPT (GUID partition table)
partitioning scheme, while keeping all data on the hard disk.
How to convert MBR to GPT with Gptgen?
Speaking of how to convert MBR to GPT with Gptgen, here you can follow the steps
Step1. Download Gptgen and unpack it to any directory. Remember
where you installed the Gptgen on. Here we installed onc:\tools\gptgen-1.1. Then, run Gptgen on Windows 10 with the
Step2. Then, run the command diskpart, under diskpart, type list
disk to display all disks in the system.
Here you can see that the Disk 0 is an MBR disk (GPT column is empty).
Step3. Using Gptgen to convert the partition table of Disk 0 from
MBR into GPT, type the syntax: gptgen.exe -w \\.\\physicaldrive0
While running this command, there appears a warning “ This tool cannot guarantee
that such partitions will remain bootable after conversion.” and ask “Do you
want to continue? [Y/N]”, type y and it will execute
Thus, Gptgen on Windows 10 convert MBR disk to GPT disk has been successful!
However, convert MBR to GPT with command line isn’t the simplest way, and it is
difficult to the people who do not know computer a lot. Once the operation wrong, it
may cause an invocatable damage. Thus, here we highly recommend you the easiest way
to convert MBR to GPT instead of using Gptgen Windows 10/8/7.
Alternative to Gptgen tool
The AOMEI Partition Assistant should
be the best alternative to Gptgen tool in Windows 10. It is a great partition
manager that can help you to manage your hard drive partitions in the best status.
Such as resize partition, create
partition, delete partition, wipe hard drive, secure erase SSD, etc.
What’s more, it allows you to convert MBR to GPT with GUI
(graphic user interface), which is relatively easier to command line, and it supports
all Windows operating systems including Windows 10/8.1/8/7/Vista/XP. AOMEI Partition
Assistant can help Windows 10 convert MBR to GPT without losing data. Once you need
to convert the boot disk between MBR and GPT disk, it also provides you the easiest
way to do it.
The steps of converting MBR to GPT disk with Gptgen alternative
Here is the guidance for how to convert MBR to GPT disk using Gptgen alternative
- AOMEI Partition Assistant.
First, install and launch AOMEI Partition Assistant, it will show
you the main interface contains the basic situation of your disk(s). Select the MBR
disk you need to convert, right click it, and select Convert to GPT
Disk in the pop up menu.
Then, it will confirm if you are sure to convert MBR disk to GPT
disk. Click OK.
You will back to the main interface, and you can see that the disk has already
changed into GPT partition table, click Apply at the toolbar.
If you are converting boot disk from MBR disk to GPT, you need to make sure if your device supports
EFI/UEFI. If not, you cannot boot successfully from the disk after conversion.
To convert MBR to GPT Windows 10, using Gptgen command line is a good way. However,
if you do not know it much more, the AOMEI Partition Assistant is more suitable for
you. Besides, if you are working with Windows Server OS, you can upgrade to AOMEI Partition Assistant Server to manage your hard drive(s).