The situation: On this weekend, I should finally receive all my hardware for my new setup.
I want to use UEFI/GPT with Secure boot OFF. So far, I only used BIOS/MBR.
I want to give it a go with NO windows installed on the system because I did not boot it for some months now.
What I want to do:
Install Manjaro on my new m.2 SSD as single operating system with architect and GPT and grub. According to my research, that should create a EFI partition so that it is bootable and should use grub.
If I get into the situation that I need Windows again, I am going to install it on a second (m.2) SSD with GPT. During the installation of Windows 10, I would remove the Linux-SSD so that Windows thinks it is the only system present and creates its own EFI partition on its SSD.
In my theory, after the installation of windows is finished, I then would add the Linux SSD again, tell the UEFI to boot from the Linux SSD as primary boot device, run update-grub there (with os-prober) and the system should then be in a dual-boot enabled state with a working Windows entry in grub.
Am I right with that?
My data HDD and data SSD will remain BIOS/MBR formatted, but they will not contain any OS. That should also cause no problems, or am I wrong there?