Sun Microsystems 220R - Manual (Page 72)

2.9.1 Keyswitch Settings
The front panel keyswitch controls the power-on modes of the system. The following
table describes the function of each switch setting.
Keyswitch
Position Icon Description
Power-On/Off This setting enables the system’s Power button to turn
the system power on or power off. If the system has
power, holding the Power button down for five
seconds while the keyswitch is in this position will
cause an immediate hardware power off.
Locked This setting disables the system’s Power button, and
also locks the front doors preventing access to the disk
drives and to the power supplies.
The Locked position is the recommended setting for
normal day-to-day operation of the system.
Standby This setting places the system in Standby mode by
turning off power to all internal system components
and by placing the power supplies in Standby mode.
When the keyswitch is in this position, the keyboard
power switch and the server’s Power button are
disabled.
2.9.2 System LED Indicators
The two system LEDs consist of a system health indicator and a fault indicator. The
system health indicator lights continuously green to show that the system is
functioning normally. The fault indicator lights when a problem is detected in the
system. Because it is important to know that a fault exists in the system, the fault
indicator remains lit whether the system is in normal operating mode, or is switched
to Standby mode using the keyswitch.
When you first power on the system, the LEDs individually blink on and off to
verify that each one is working correctly. After that, the LEDs operate as described in
the following table.
72 Sun Enterprise 220R Server Service Manual
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January 2000, Revision A