Receiving the error "Cannot Find OS partition(s) for disk 0" during the mbr2gpt /AllowFullOS /validate operation
Receiving the error "Cannot Find OS partition(s) for disk 0" during the mbr2gpt /AllowFullOS /validate operation
Good afternoon everyone, I've been testing my new computer for a few months. I wondered if upgrading to Windows 11 would be possible since my old system ran Windows 10 with many updates ahead. It seems Windows 10 didn't support secure boot for Windows 11. After some reading, it looks like my BIOS (ASUS ROG STRIX 570-I MB) is set to Legacy mode by default for boot devices. Research suggests I can switch from MBR to GPT on the main drive and then update the BIOS to UEFI. However, when trying to validate the C: drive I get an error saying "Cannot Find OS partition(s) for disk 0." In Disk Management, it shows my main drive is labeled Drive 1 instead of Drive 0. I'm unsure what steps to take next. I've attached screenshots of the CMD command and a drive order snapshot. Any guidance would be helpful. My current drives are: C: (Samsung 980 Pro 500GB, Windows 10), D: (Samsung 980 1TB, Storage drive), E: (Samsung 860 2TB, Storage Drive). Thanks!
Consider exploring alternative solutions or simply restoring a fresh installation, which remains the recommended approach.
Your C: partition isn't disk0, it's disk1. Add /disk:1 to the mbr2gpt command mbr2gpt /AllowFullOS /validate /disk:1. Another option is to disconnect all storage drives and run mbr2gpt using just your boot drive connected.