Booting the backup firmware

You can reboot the FortiGate unit from the backup firmware, which then becomes the default firmware.

Starting from the main BIOS menu

[B]: Boot with backup firmware and set as default.

If the boot device contains backup firmware, the FortiGate unit reboots. Otherwise the unit responds:

Failed to mount filesystem. . .

Mount back up partition failed.

Back up image open failed.

Press ‘Y’ or ‘y’ to boot default image.