I have a Evo 14 Slimbook with two Samsung 990 4TB NVMe drives set in RAID0. A few days ago I did a fresh install of nixos, as the configuration that was shipped to me did not include LUKS encryption for the drives, and I consider that a critical security feature while I am traveling. I have been pulling my hair out trying to figure out what the problem is with why I can boot into a live USB just fine and go through all of the steps to do an install apparently flawlessly including LUKS on the RAID0 partition, but when I try to boot up after install I am greeted with a GRUB prompt.

At first I thought it was becuse of the encryption, because that was the most immediate change. When I went through all of the steps again without doing encryption I have the same problem though. I very carefully went through the manual install process (I'm new to nixos, so there was admittingly some learning curve) to ensure GRUB was not used and systemd was set up with no errors, and I still get a GRUB prompt. At this point I started feeling a bit crazy, so I looked closer at the BIOS settings and a few of the settings there make no sense to me. In the 'Advanced' section the NVMe RAID mode is set to 'Disabled', and reverts back to that on every reboot even if I change and save. On the 'Boot' options only one NVMe drive comes up on the list, which seems wrong, but since it does show up correctly while in a live environment maybe that's just how it should look.

I'm a bit at a loss at the discrepency of what I see at boot compared to inside a live environment, and I'm not sure what I'm missing in between. Any help would be appreciated, thanks!