Hi,
Not sure if this is the correct place to post this, if not please move it :)
I ran into error 19 while trying to install to a no-name chinese celeron machine from a sandisk 64 GB USB3 drive (usb3 port also).
After trying a bunch of solutions out there I found this.
https://forums.FreeBSD.org/threads/booting-from-usb-error-19.57429/post-327585
This worked for me :)
Just stop the auto run at the initial menu (esc or space).
Run these two lines.
set vfs.root.mountfrom="ufs:/dev/da0p2"
boot
This spams an error about 20 times and then restarts. After restarting I let it auto run and it happily went all the way to the installation.
If this is stupid some stupid noob error feel free to delete this thread, this is my first experience of both soft routing and freebsd.
Hoping this can help someone else and maybe give a hint to a developer about what could/should be changed to not run into this.