Forum Discussion

Copper Contributor

Mar 23, 2018

MBR2GPT Disk layout validation failed

When i try to run mbr2gpt /validate /disk:0 /allowFullOS i get the following output MBR2GPT: Attempting to validate disk 0 MBR2GPT: Retrieving layout of disk MBR2GPT: Validating ...

Smart2470

Copper Contributor

Oct 07, 2021

I faced this issue because my system partition and boot partition were different disks

I copied the system partition to the same disk as boot partition, rebooted with bios change to point to correct disk (boot order), then deleted to older system partition on wrong disk.

I was able to run this command successfully after that.

Turned the boot to uefi from legacy

Enabled secure boot and tpm 2

Now I am able to install windows 11. Hope this helps.

xdGrimzy

Copper Contributor

Oct 14, 2021

Smart2470 how did you copy the system partition to a different drive?

Naeem86
Copper Contributor
Oct 14, 2021
You can you use macrium reflect software. Its free and works very well.
Smart2470
Copper Contributor
Oct 14, 2021
xdGrimzy- There are several articles on the internet if you search for 'system partition and file partition on different drives'. I used some freeware to copy the system partition, switch the bootup disk order in BIOS, deleted the partition on the wrong drive.