i want to install ubuntu on a kind of firewall device, that has no usb-port or other connections except LAN. (I don't want to setup a whole tftp etc). So I decided to install ubuntu on an external USB drive holding the 2,5" harddrive of my firewall. Later I placed the harddrive into my firewall and hoped everything would be fine (note, both are x86 architecture). Unfortunately it is not working, the firewall tells me "DISK BOOT FAILURE". Do you have any idea why this is happening, and how I could fix it?
I suspected a grub problem, but even after mounting the USB harddrive in my running Linux, chrooting in /mnt and reinstalling grub nothing changed.
I would be very happy if you could help me on this one :) TIA