Enable /Disable autoboot using "setboot" command :

To make auto boot on:

# setboot -b on

To make autoboot OFF

# setboot -b off

# setboot
Primary bootpath : 0/1/1/0.1.0
HA Alternate bootpath : <none>
Alternate bootpath : 0

Autoboot is ON (enabled) <<<==This means its on


# setboot
Primary bootpath : 0/1/1/0.1.0
HA Alternate bootpath : <none>
Alternate bootpath : 0

Autoboot is OFF (disabled) <<==Now it is OFF