Headless FreeNAS install

For some reason, FreeNAS installation image doesn't seem to have serial console enabled.
When googling around for this, folks seem to think this would be impossible because "If you don't have com ports (include disable port), boot process is stopped for waiting the port output is ready"
However, pfSense manages to do this just fine.
But they do have separate images, which is just fine.

Next time I try to do this, I will
- use an usb stick with activity led
- plug in a usb keyboard
- wait until the activity stops
- hit "2" on the usb keyboard

to select the grub menu item with serial console enabled.
Maybe that will then allow me to install FreeNAS without a monitor. Not sure though.


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