\$TARGET in grub syntax, like hd0,0 for /dev/sda1.
--grub <device> Target for grub installation. Use grub syntax for
specifying, like hd0 for /dev/sda.
+ --arch <arch> Architecture to use. Currently only i386 and amd64
+ are supported.
Configuration options:
[ "$_opt_bootappend" ] && BOOT_APPEND=$_opt_bootappend
[ "$_opt_groot" ] && GROOT=$_opt_groot
[ "$_opt_grub" ] && GRUB=$_opt_grub
+[ "$_opt_arch" ] && ARCH=$_opt_arch
[ "$_opt_verbose" ] && VERBOSE="-v"
[ "$_opt_help" ] && {