I have used the MBR2GPT validate command without the "/allowFullOS" in the Windows Recovery Environment (RE) and it worked. Will the conversion work in the Recovery Environment without the "/allowFullOS" or only in Windows PE. Can Windows PE ONLY be run from a USB or is it on the C Drive already and can be run from there and how do you get to it if it is. Is it the safest option to run MBR2GPT from Windows PE or is it safe using the /allowFullOS.
Is the entire disc converted in one go to GPT in the process? How does it do the conversion without destroying any data?
Once I have converted my Hard Drive System Disc to GPT will I have any issues copying files from an external USB MBR Disc to the GPT Disc.
"/allowFullOS By default, MBR2GPT.exe is blocked unless it is run from Windows PE. This option overrides this block and enables disk conversion while running in the full Windows environment.
Note: Since the existing MBR system partition is in use while running the full Windows environment, it cannot be reused. In this case, a new ESP is created by shrinking the OS partition."
Will it then after conversion delete the original ESP (existing system partition?).
I have a 3TB Disc so lack of space is not a problem.
Edited by nopejo, 23 February 2018 - 10:49 PM.