Boot an x86 based
system from a specified ZFS root file system.
If you install or upgrade
your system to an Oracle Solaris release that supports a ZFS boot loader,
the GRUB menu entry for the default ZFS BE contains the -B $ZFS-BOOTFS boot
argument. The system therefore automatically boots from aZFS root.
Note - This option is supported
only for boot devices that contain a ZFS pool.