ZFS + GPT with root on memory stick and mirrored SATA drives

[Carl Chave]

<snip>
> echo -en "\n\nNow run these two commands to make the changes live, and
> reboot
>  zfs set mountpoint=legacy $zpool/be/$nroot
>  zpool set bootfs=$zpool/be/$nroot $zpool\n\n"

Thanks for the input krad.  It would be nice to easily switch back and
forth but aren't you still stuck if everything blows up on that first
reboot?  In order to switch back to the known working dataset you've
got to get to a fixit prompt to set the correct bootfs property right?