Great work. everything works as described. However, there is a deviation. In the Info-Center of my Synology DS3622 i have a different Mac address than in the grub.cfg? I would have expected them to be the same.
I wanted to change the serial number and mac address to register a surveillance license. But if the mac address is not taken over correctly, it is probably difficult.
EDIT:
Nevermind, changed serial and mac in grub.cfg and everything is fine. Mac in Info-Center does not changed but i could register my licence.