The EaseUS Partition Master cannot convert the MBR to GPT format.
The EaseUS Partition Master cannot convert the MBR to GPT format.
Disk Prerequisites
Prior to any modifications to the disk, MBR2GPT checks the layout and geometry of the chosen disk to confirm it meets the following requirements:
The disk is currently running MBR
Sufficient space exists beyond partitions to store the primary and secondary GPTs: 16KB plus two sectors at the front, and 16KB plus one sector at the end
No more than three primary partitions appear in the MBR partition table
One partition is designated as active and serves as the system partition
The disk lacks any extended or logical partitions
The BCD store on the system partition includes a default OS entry linking to an OS partition
Volume IDs are accessible for each volume assigned a drive letter
All partitions on the disk are MBR-compatible and recognized by Windows or have a mapping defined via the /map command-line option
Should any of these conditions not be satisfied, the conversion will halt and an error will be returned.
Instead of focusing on the reasons it might fail, let's look at the motivations behind the request.
I understand that reformatting the entire drive into GPT format would erase everything in both partitions, but I need to remove all data from one specific partition. This is the best option available. The MBR2GPT tool is the most practical choice, though EaseUS mentions that the partition environment doesn’t support conversion. If this refers to the BIOS setting, there could be complications—especially if the BIOS isn’t UEFI compatible right now. Updating it might be necessary for the UEFI to function properly, but this could render the storage drive unusable until the BIOS is updated or replaced. Therefore, it’s important to verify whether the UEFI works before proceeding with GPT conversion or using third-party software.
I understand that reformatting the entire drive into GPT format would erase everything in both partitions, but I need to remove all data from one specific partition. This is the best option available. The MBR2GPT tool is the most practical choice, though EaseUS mentions that the partition environment doesn’t support conversion. If this refers to the BIOS setting, there could be complications—especially if the BIOS isn’t UEFI compatible right now. Updating it might be necessary for the UEFI to function properly, but this could render the storage drive unusable until the BIOS is updated or replaced. Therefore, it’s important to verify whether the UEFI works before proceeding with GPT conversion or using third-party software.
I'm not sure what SkyNetRising was referring to, but all the MS requirements for Partition configuration using MBR2GPT are valid. The conversion will be carried out on the first disc, Disk 0, and Disk 1 can be ignored.
As mentioned above by SkyNetRising, your partition config will not work with MBR2GPT.
Thisis
also
why it fails with EaseUs.
Here’s an alternative way to phrase it:
Back up everything first, then reinstall Windows by removing all partitions and formatting the drive.
These two checks will not pass.
The bootloader partition must remain distinct from the Windows OS partition. Right now, both reside in the same partition where Windows is installed.
To meet MS requirements, you should:
remove recovery partitions from disk 0,
move the contents of D to another location,
delete D: partition,
create a new bootloader partition with NTFS, 500MB, primary, active,
then apply the bcdboot command to write bootloader files there,
and adjust the boot priority to use the 240GB drive.
Use the mbr2gpt utility afterward.