Today I helped a friend with his PfSense firewall that had died due to hardware issues.
We put in my Intel USB SSD (it had gotten left over from my FreeNAS server) and was identic to the one he used previously.
Since we reinstalled we used the chance to try out AMD64 2.0-BETA5.
All was well through the installation but after reboot the system could not mount the disk.
We rebooted and opted for “Boot from USB” in the menu wich worked just fine.
Just set the sysctl option
in /etc/loader.conf to make the system wait a little longer when mounting from USB.
This solution probably works across all the FreeBSD derivatives.