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 ...

antijanson

Iron Contributor

Sep 25, 2025

It's a common issue that users receive MBR2GPT Disk Layout Validation Failed message when they try to convert MBR to GPT. In this article, you will learn three reliable ways to resolve this problem:

https://www.devshowto.com/mbr2gpt-disk-layout-validation-failed