freebsd-update freebsd-update is not meant to be run in parallel with the same workdir (-d). bootcode update If you have the good old MBR, try this to update the bootcode. gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada0 References https://docs.freebsd.org/en/books/handbook/cutting-edge/#updating-bootcode https://man.freebsd.org/cgi/man.cgi?query=gptzfsboot&sektion=8&format=html