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Sun Fire V1280/Netra 1280 Server Considerations for Improving RAS

Sep 26, 2003

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LED Status and Alarms

This section contains information on how to check the LED status and the system alarms. It also contains information about the system fault indicator states and the system location indicator.

LED Status

In addition to looking at diagnostic information, the state of the various LEDs on the system provide additional information as to where a fault occurred. Use the LEDs on the individual system components to determine if the system is operating normally. LEDs should be routinely monitored on the IB_SSC, system boards, L2 repeaters, fan trays, and power supplies.

All of the FRUs, with the exception of the power supplies and fans, have power, fault, and OK_to_Remove LEDS. Power supplies (PSUs) have power, predictive fault, and fault LEDs. All of the power supply indicators are lit by power supply hardware. The predictive fault LED (amber) blinks when the power supply fan speed falls below a specified limit. In this condition, the PSU is in degraded mode, but it is still supplying power to the main and standby outputs.

The internal disks have power, fault, and OK_to_Remove LEDs. The system indicator board contains the locator, top access, system fault, alarm1, alarm2, UNIX^_ running (alarm 3), source A, and source B LEDs (as shown in the following figure).

FIGURE 1 1280 Server LEDs

 showlocator
locator is off
lom> setlocator on
lom> showlocator
locator is on
lom> setlocator off

You should turn the system locator LED off after the particular system in question has been identified.

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