Oracle Sun Netra T5440, Service Manual, Page: 19 / 162

1.3 Using LEDs to Identify the State of Devices
Chapter 1 • Server Diagnostics 19
TABLE 1-2
Front and Rear Panel LEDs
LED Location Color Description
Locator LED and
Button
Front upper left
and rear center
White Enables you to identify a particular server. The LED is activated using one of the
following methods:
■ Issuing the setlocator on or
off
command.
■ Pressing the button to toggle the indicator on or off.
This LED provides the following indications:
■ Off – Normal operating state.
■ Fast blink – The server received a signal as a result of one of the preceding
methods.
Fault LED Front upper left
and rear center
Amber
If on, indicates that service is required. The ALOM CMT CLI
showfaults
command provides details about any faults that cause this indicator to be lit.
Activity LED Front upper left Green ■ On – Drives are receiving power. Solidly lit if drive is idle.
■ Flashing – Drives are processing a command.
■ Off – Power is off.
Power Button Front upper left Turns the host system on and off. This button is recessed to prevent accidental server
power-off. Use the tip of a pen to operate this button.
Alarm:Critical LED Front left Red Indicates a critical alarm. Refer to the server administration guide for a description
of alarm states.
Alarm:Major LED Front left Red Indicates a major alarm.
Alarm:Minor LED Front left Amber Indicates a minor alarm.
Alarm :User LED Front left Amber Indicates a user alarm.
Power OK LED Rear center Green The LED provides the following indications:
■ Off – The system is unavailable. Either the system has no power or ILOM is not
running.
■ Steady on – Indicates that the system is powered on and is running it its normal
operating state.
■ Standby blink – Indicates that the service processor is running while the system
is running at a minimum level in Standby mode, and is ready to be returned to its
normal operating state.
■ Slow blink – Indicates that a normal transitory activity is taking place. The
system diagnostics might be running, or that the system might be booting.
1.3.2 Hard Drive LEDs
The hard drive LEDs ( Figure 1-4 and Table 1-3 ) are located on the front of each hard drive that
is installed in the server chassis.