file contains options for the
boot block code.
boot loader runs, it searches the
slice of the boot partition for a
file (as a result, slices which are missing an
partition require user intervention during the boot process).
file is found, its contents are used as the default configuration
options for the boot block code and are echoed to the system console.
A valid format of this file is to put BIOS drive number, a controller
type, a unit number, a partition, a kernel file name, and any other
option on a single line, as it is done at the
The options related to the boot image selection described below and all
the other options available for
are documented in detail in the
# echo "-P" > /boot.config
will activate the serial console of
# echo "1:ad(1,a)/boot/loader" > /boot.config
will instruct the second stage of
on the first disk to boot with the third
stage from the second disk.
# echo "1:ad(1,a)/boot/loader -P" > /boot.config
will do both of the above.