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 ...

Odal53

Copper Contributor

Oct 02, 2021

If it were a matter of syntax, it would have shown. I still did try it out
mbr2gpt /disk:1 /validate /allowFullos

and I started Dos as administrator. I wish someone from MS would react. As grateful as I am for your concern.

edit: according to AOMEI partition assistant, the boot partition and the system partition are on different disks and that I should not convert disk 1. I suppose I'll have to make the system disk as disk 0 to get any further.

I still would like to thank you for your contributions.

Naeem86

Copper Contributor

Oct 02, 2021

Odal53

i dont think its system partition issue. see the screen shot of my disk 0, which is my converted disk. it has system resevered, os and efi partitions + the 2gb un-allocated space.

can you check and verify if your disk is mbr? I just did a validation and it failed as well. Im wondering if it fails once the drive is already converted to gpt.

Heres link you can follow and try the conversion from preOS environment. its basically the recovery environment.

https://www.windowscentral.com/how-convert-mbr-disk-gpt-move-bios-uefi-windows-10

see if that helps.

Alexander_Hoe
Copper Contributor
Oct 06, 2021
I have the same problem, but i got it on the HDD with Windows on it, the other 2 doesnt work
Odal53
Copper Contributor
Oct 02, 2021
Naeem86
It is MBR. I think the only solution is a back up and a clean installation. When I disable the other boot options, my system drive does not boot. I can set up secure boot and TMP in the bios, but i must reinstall.