4–Diagnostics/Troubleshooting Power-On Self Test

Power-On Self Test

The switch performs a Power-On Self Test (POST) as part of its power-up procedure. The POST diagnostic program performs the following tests:

Checksum tests on the boot firmware in PROM and the switch firmware in flash memory

Internal data loopback test on all ports

Access and integrity test on the ASIC

During the POST, the switch logs any errors encountered. If there are no errors, the CPU Heartbeat LED blinks at a steady rate of once per second. If a fatal error occurs, the Chassis Fault LED illuminates and the CPU Heartbeat LED may show an error code blink pattern.

Error Code Blink Patterns

The CPU Heartbeat LED indicates the operational status of the switch. When the POST completes with no errors, the CPU Heartbeat LED blinks at steady rate of once per second. When the switch is in maintenance mode, the Heartbeat LED illuminates continuously. Refer to “Recovering a Switch Using Maintenance Mode” on page 4-15for more information about maintenance mode. All other blink patterns indicate critical errors.

The CPU Heartbeat LED shows an error blink pattern for the following conditions:

2 blinks - Internal Firmware Failure Blink Pattern

3 blinks - Fatal POST Error Blink Pattern

4 blinks - Configuration File System Error Blink Pattern

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59229-05 A

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Q-Logic 9100, 59229-05 A manual Power-On Self Test, Error Code Blink Patterns

59229-05 A, 9100 specifications

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