Forum Discussion
Shifting from BIOS to UEFI with the Windows 10 Creators Update MBR2GPT disk conversion tool
Comprehensive yet quick video overview that explains how you can safely and non-destructively convert a Windows 10 machine from legacy BIOS to UEFI disk partitioning; and how you can automate the con...
Error while validating Disk
C:\WINDOWS\system32>mbr2gpt /allowFullOS /validate
MBR2GPT: Attempting to validate disk 0
MBR2GPT: Retrieving layout of disk
MBR2GPT: Validating layout, disk sector size is: 512 bytes
Disk layout validation failed for disk 0
Check your setupact.log & setuperr.log files in %Windir%\Panther. There should be some verbose information in one of those logs.
-Mike
- hi, if mbr disk have 4 partitions it will fail, i deleted one partition then it worked.
- worked for me like magic !!! deleted one partition using diskpart tool in cmd prompt and voila !! thank u
worked for me like magic !!! deleted one partition using diskpart tool in cmd prompt and voila !! thank u
- This makes sense as the conversion process will create one partition hence you at most can have three existing partitions. The documentation here:
https://docs.microsoft.com/en-us/windows/deployment/mbr-to-gpt
actually states:
There are at most 3 primary partitions in the MBR partition table
But, again a shoutout to Microsoft developers: The errors you (Developers) throw are not there for so only you can debug your code. They are first and foremost for the user to understand what has gone wrong. So the question remains: Why is there no error message on validation that states: There are too many partition on disk x, please reduce the number of partitions to at most 3 to be able to convert. --> This should not be that hard.
