sa8220 - User Guide

A P P E N D I X E Running Diagnostics

301

Boot-time LED Diagnostics

The front panel’s Status, Act 1 and Act 2 LEDs display the transition

through a sequence of codes at boot time indicating the SA8220’s

progress through the boot process. If the boot process aborts,

terminates, or hangs before the SA8220 is online and functional, the

state of the LEDs can help in diagnosing the problem. The table

below describes the restart sequence and conditions.

After restart completes, the Status LED begins to blink and LED

activity begins as described in the next section, “Run time LED

Diagnostics.”

Run time LED Diagnostics

At run time, the LEDs provide information about unit activity as

described below:

Status LED

• Blinks on and off quickly when serving as the active or

standalone SA8220.

• Blinks on and off slowly when configured for serial cable

failover and serving as the backup SA8220.

• Continuous on or off indicates a unit that has stopped responding

(hung).

Status Act 1 Act 2 Condition

Off Off Off BIOS boot failed

On Off Off OS boot process failed

Off On Off OS boot stage 1 failed

On On Off OS boot stage 2 failed

Off Off On OS boot stage 3 failed

On Off On Application never started up

Off On On Application restart stage 1 failed

On On On Application restart stage 2 failed