About MBR and GPT disk
Suppose you have a 4TB drive partition and accidentally initialize the disk to MBR,
then there will be a 2TB waste. Because MBR disks only support up to 2TB partition
size, once partition size surpasses 2TB, the excess part cannot be read or
displayed. However, GPT disks are capable of a maximum 18EB
In addition, MBR disk only allows four primary partitions at most, if more partitions
are needed, you have to build a secondary structure known as extended partition and
then you can create logical partitions. However, GPT disk allows 128 partitions
which are similar to the primary partition of MBR.
As you see, GPT disks are more better than MBR disks. Except above said,
partition on GPT disk has self-contained backup which is stored on the two ends of
the disk. If one of the backups is destroyed, you can restore your disk with
another. Therefore, converting disk which is accidentally initialized to MBR to
GPT is a wise solution, to do this, you need a third-party software like AOMEI Partition Assistant to avoid data loss.
Convert MBR to GPT with AOMEI Partition Assistant
With data on your accidentally initialized hard drive, it’s risky to convert MBR to
GPT with Disk Management. Because DM can only initialize a disk without any
partition on it, or you must delete all
partitions to get a totally unallocated disk so as to achieve the job
with it. If you insist, a backup is needed to keep data safe and we
recommend you AOMEI Backupper. Or
you can choose AOMEI Partition Assistant to finish the conversion job without
data loss. And before you do, please make sure your boot mode is UEFI which is
required for GPT disk.
Step 1:Launch AOMEI Partition Assistant
Profession. Select the data disk you want to convert and right click it. And
then select "Convert to GPT Disk" in the drop-down menu.
Step2: Click "OK" after confirming the operation.
Step3:You can preview the conversion. To save the change, please
click "Apply" on the toolbar.
For conversion between MBR and GPT disks on Laptop, please make sure the power
supply is sufficient.
To ensure the data is consistent, do not abnormally terminate the program
during the conversion process.
AOMEI Partition Assistant is a free and professional partition manager, supporting all Windows editions. With it, you also can resize C drive and merge two primary partitions, etc.