Forum Discussion
MBR2GPT Disk layout validation failed
Aaron B Boot with USB windows 10 PE, and then try to enter below command
mbr2gpt.exe /validate /disk:0
mbr2gpt.exe /convert /disk:0
Note once conversion formats all partitions in the Disk 0 , you wont be able recover anydatas .
for more information, visit below page
**https://docs.microsoft.com/en-us/windows/deployment/mbr-to-gpt**
@Aaron B Boot with USB windows 10 PE, and then try to enter below command
mbr2gpt.exe /validate /disk:0
mbr2gpt.exe /convert /disk:0
The validate command will fail if you run it in a regular Win10 PE (such as AOMEI PA USB boot drive) without manually adding the ReAgent.dll file to the PE environment first ... see Known Issue and Workaround sections of https://docs.microsoft.com/en-us/windows/deployment/mbr-to-gpt#troubleshooting for explanation.
RAJUMATHEMATICSMSC This is not what i wanted, i wanted to convert the disk while keeping all of my stuff. (See the /allowFullOS switch)
I was facing similar problem as my disk partition was in MBR format but I need it to be GPT format.
Disk validation failed.
Easiest way is solve this problem is as given below.
Go to Disk Manager -> Select disk (0 or 1 ) you want convert and select the partition eg. C -Drive
Right click --> Shrink the disk and put shrink value to 200MB ->OK
Go to CMD with admin mode run the below command
mbr2gpt /validate /disk:0 /allowFullOS -> Enter
Validation is success
Run below command to convert
mbr2gpt /convert /disk:0 /allowFullOS
Disk will be converted to GPT
Go to BIOS and change Legacy to UEFI mode and change boot sequence
Your system will boot with mfg logo
NO Data lossPalani Samy had to say thx I worked on this all day and though I read this fairly early on I kept looking for an easier way. This was it though.
Ill unsubscribe from this because its 2 years old and i no longer require assistance with this.
