On 20/08/2025 03:51, Van Snyder wrote:
Let me know when you develop a method to convert a drive from MBR to GPT without blowing away the partition table.
I have seen this one: <https://manpages.debian.org/sgdisk#g,>
-g, --mbrtogpt
Convert an MBR or BSD disklabel disk to a GPT disk. As a safety measure,
use of this option is required on MBR or BSD disklabel disks if you
intend to save your changes, in order to prevent accidentally damaging
such disks.
I have not tried it though. The question is Windows and steps are necessary afterwards to make it working.
Reading this thread I am in doubts if Windows 10 booted in UEFI (Secure Boot) or in BIOS (CSM, legacy, etc.) mode originally. I expect the former. Have you overwritten original drive? Can you check files on EFI System Partition there (EFI/Microsoft/)?
Are there any traces of Windows 10 in
efibootmgr -v
It reads NVRAM, not drives.