Root on USB stick

[Lou Katz]

Where does the FreeBSD boot loader for Pi2 know about or find out
where the root partition is? I need to boot from an image in the
micro slot that I cannot remove (because I broke the push-pull mechanism)
but use a root parition on another card accessed through a USB port.

There seems to have been a way to do this with FreeBSD 10, but I cannot
find it in FreeBSD 11.

Thank you
-- 

-=[L]=-
Hand typed on my Remington portable

Ich kann in vielen Positionen aufgestellt werden!