Q-Logic SB2A-16B Manuel D’Utilisation

59021-09 A

5-1

Diagnostics/Troubleshooting

Diagnostic information about the switch is available through the chassis LEDs, the 
power supply LEDs, and the Logged-In LED. Diagnostic information is also 
available through the SANsurfer Switch Manager and CLI event logs and error 
displays. This section describes two types of diagnostics: Power On Self Test 
(POST) and chassis. POST diagnostics describe the Heartbeat LED and the port 
Logged-In LED indications. Chassis diagnostics cover power supply and fan 
diagnostics as well as over temperature conditions. This section also describes 
how to use maintenance mode to recover a disabled switch.

The switch performs a series of Power On Self Tests (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. Some POST errors are 
critical, others are not. The switch uses the Heartbeat LED and the Logged-In 
LED to indicate switch and port status. A critical error disables the switch so that it 
will not operate. A non-critical error allows the switch to operate, but disables the 
ports that have errors. Whether the problem is critical or not, contact your 
authorized maintenance provider.

If there are no errors, the Heartbeat LED blinks at a steady rate of once per 
second. If a critical error occurs, the Heartbeat LED will show an error blink 
pattern. If there are non-critical errors, the switch disables the failed ports and 
flashes the associated Logged-In LEDs. Refer to 

 for more information about Heartbeat LED blink patterns.