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I have a 4 disks setup: 240GB NVMe SSD, 120GB Sata3 SSD, 2TB HDD, 3TB HDD.

I bought all the components and installed Windows on /dev/sdd which is the 240GB NVMe SSD.

Then I started thinking about dual booting with a Linux distro and I wanted to use Arch because it is the "most difficult" operating system and since you have to manually create from scratch even the bootloader configs for rebooting the system and it even does not automatically recognize your Windows installations, means that if I can "beat" this system in learning how to use it, then I have the knowledge to use every Linux based OS I want right?

So after installing Arch several times because I have a UEFI motherboard and I kept using my hard rock brain that I found inside my head installing Arch in BIOS mode not sure why, I finally got it working and booted, to find out that I created TWO EFI partitions, one on /dev/sdc1 (120GB SSD) and the other (that Windows created during installation) on /dev/sdd1 (NVMe). Now I would like to move the GRUB from the 500MiB EFI on the Sata SSD to the NVMe drive, which I successfully completed, but Windows is not recognized and performing ls /EFI/EFI/Microsoft/boot I get that the file or directory is incorrect, maybe because ls /EFI/EFI reports NO Microsoft folder, that is probably caused by Arch that is mounting/booting the EFI partition in the Sata SSD in /EFI all tho I booted from the GRUB installed on the WD240G (NVMe drive) in the boot menu at startup.


So, Arch does work via GRUB, Windows does work selecting his own boot manager, but the GRUB does not boot Windows and Arch has no Windows folder or files inside his EFI, which now should be the same as the Windows EFI but seems not, all tho I performed umount /EFI, mount /dev/sdd1 /EFI, grub-install --target=x86_64-efi --efi-directory=esp --bootloader-id=GRUB and grub-mkconfig -o /boot/grub/grub.cfg.

Now does anyone know why I'm still not able to boot Windows from the Windows EFI GRUB and/or why Arch does not see Windows in his EFI?

(do I have to format/delete the /dev/sdc1 EFI partition created during Arch installation or do I have to reinstall Arch a final time with the correct setting now that I know how to do it, mounting /dev/sdd1 in /EFI?)

Thank you so much to everyone that tries to understand my concern, have a good day.

Bryan.