I highly recommend zfs with beinstall (/usr/src/tools/build/beinstall.sh ). It automatically creates a new ZFS bootenv, installs world & kernel to it, and upgr

I highly recommend zfs with beinstall (/usr/src/tools/build/beinstall.sh ). It automatically creates a new ZFS bootenv, installs world & kernel to it, and upgrades your packages. If there is an issue, you can select the old bootenv from the boot loader prompt and be back in your old, pre-updated OS with nothing at all changed.