System Control Switch Settings - Sun Microsystems Sun Fire V490 Parts Installation And Removal Manual

The following table describes the function of each system control switch setting.

System Control Switch Settings

TABLE 1-5
Icon Position
Normal
Locked
Diagnostics
Forced Off
Description
This setting enables the system Power button to power the
system on or off.
This setting disables the system Power button to prevent
unauthorized users from locally powering the system on or
off. It also disables the keyboard Stop-A command, terminal
Break key command, and ~# tip window command,
preventing users from suspending system operation to access
the system ok prompt. You can still power off the system
remotely using a system controller console.
The Locked setting, used for normal day-to-day operations,
also prevents unauthorized programming of the system Boot
PROM.
This setting enables service mode, a Sun-prescribed level of
power-on self-test (POST) and OpenBoot
to run during system startup and system resets. The Power
button functions the same as when the system control switch
is in the Normal position.
This setting forces the system to power off immediately and to
enter 5-volt standby mode. It also disables the system Power
button. You may want to use this setting when AC power is
interrupted and you do not want the system to restart
automatically when power is restored. With the system control
switch in any other position, if the system were running prior
to losing power, it restarts automatically once power is
restored.
The Forced Off setting also prevents a system controller
console from restarting the system. However, the system
controller card continues to operate using the system's 5-volt
standby power.
Chapter 1 Identifying Front and Back Panel Features
™
Diagnostics tests
9