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Date: Mon, 4 Jul 2016 06:00:33 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: Gary Palmer <gpalmer@freebsd.org>
cc: freebsd-usb@freebsd.org
Subject: Re: USB and loader.conf hints
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On Sun, 3 Jul 2016, Gary Palmer wrote:

> Hi,
>
> Is it possible to wire a disk device to a particular USB port
> via loader.conf hints?
>
> My problem is that my root device appears via USB.  If I leave my 3g
> dongle attached, then it competes for the root device for what gets
> da0, and the two times I've tried the dongle wins and gets da0 and
> the boot stops as it can't find the root partitions.
>
> This is in a nanobsd install, so I'm not sure if labels would work
> as nanobsd is set up to use device names.

Labels are exactly the thing to solve this.  If nanobsd does not support 
them yet, working on that is probably easier and long-term more useful.