All changes made for VIM in the boot.ini based on existing variables in u-boot (open the console UART and execute a command “printenv”). Mind you, VIM is not equal to C2 Odroid, this is a different system and different foundations. You can create your boot.ini with a clean slate. Why do you need to write your settings in u-boot ? There is a much safer way. Use external scripts - boot.ini (text / plain) file, or activate the multi-boot and use s905_autoscript (binary file, which is going from a text). To do a full backup on VIM a breeze. Can use dd. Run the command “fdisk -l” and it becomes clear that to specify the argument “if=”. And for ease of manipulation, backup and subsequent (if necessary) restoration, it is recommended to use a ready image Armbian with built-in utilities to do this (ddbr).
PS If the problem with foreign languages, I recommend the threads where all you can ask in Russian.