AMR

First of all, Have you tried installing the OS directly on your NVMe via balenaetcher? If not i think you should give it a shot. I am not entirely sure if thats possible though. For what you are looking for, bootloader on eMMC which boots from Nvme sounds very reasonable. It does provide an option in RKDevTool to select a device. It should be PCIE from my guess, but if it doesn't work try SATA. Other than that, I honestly suggest you install the OS directly on your EMMC and keep the /var data or /home (depending on your requirement) on the NVMe. Oh by the way, Loader is flashed directly on the device in perhaps some unreadable memory, However I am not very sure of that (Wasn't able to see it anywhere personally in lsblk) EDIT: I've found this: https://docs.armbian.com/User-Guide_Getting-Started/#how-to-install-to-emmc-nand-sata-usb

Apologies if i misunderstood, are you attempting to install armbian on eMMC or on your m.2 SSD? Well the first preference is SD card / USB device, and the second preference is eMMC. Regarding installing on eMMC you can follow these steps: - Remove all the devices which might power the device - Not officially mentioned but just to be safe remove any storage devices - Connect the USB to TYPEC port on your Banana Pi M7 and the other end to your PC - Make sure drivers are installed for your device (I am using windows for this so i only know how to do so via windows) - Use RKDevTool v2.96 (In the official docs they provided an older version, just use 2.96 since i've personally tested it and it works) - Hold the reset button (if flashing for first time) Or Markrom button, and only THEN insert the DCIN (make sure it has atleast 35W of power) - If your drivers were installed, it should successfully show your device in Maskrom mode in your RKDevtool 2.96 - Do this: - Make sure to check Write by Address, it's important - Another thing, the image you select here should be .img, and not .img.xz (extract it first if its .xz) - It should install armbian on your device. Here's my sources: Getting Started BPI-M7 | BananaPi Docs (Install Image to eMMC 2 section)