[jmaloney@pcbsd-1818] ~% beadm list
BE         Active Mountpoint  Space Created
default    R      /mnt         7.5G 2013-12-27 12:40
sysmanager N      /          157.3M 2013-12-27 19:06
[jmaloney@pcbsd-1818] ~% pc-su pc-bootconfig
Password:Locale: "en" 
Starting up pc-bootconfig... 
Load GRUB defaults: "/usr/local/etc/default/grub" 
List BE's 
Load GRUB custom entries: "/boot/grub/custom.cfg" 
Save GRUB defaults: "/usr/local/etc/default/grub" 
Generating grub.cfg ...
Found theme: /boot/grub/themes/pcbsd/theme.txt
done
Copying grub.cfg to tank/ROOT/default...mount: tank/ROOT/default: Device busy
Failed to mount tank/ROOT/default
List BE's