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8/20q Fibre Channel Switch installation and reference guide 41

4 Diagnostics and troubleshooting

Diagnostic information about the switch is available through the switch LEDs and the port LEDs. Diagnostic

information is also available through the CLI, QuickTools, or Simple SAN Connection Manager event logs

and error displays. This section describes the following types of diagnostics:

• Switch diagnostics, page 41 describes the Input Power LED and System Fault LED indications.

• Power-On self test diagnostics, page 42 describe the Heartbeat LED and the port Logged-in LED

indications.

This section also describes using maintenance mode to recover a disabled switch.

Switch diagnostics

The 8/20q Fibre Channel Switch has three switch LEDs that are used for diagnostics: Input Power LED,

Heartbeat LED, and the System Fault LED (Figure 14).

Figure 14 Switch LEDs

The following conditions are described in this section:

• Input power LED is extinguished, page 41

• System fault LED is illuminated, page 42

Input power LED is extinguished

The Input Power LED illuminates to indicate that the switch logic circuitry is receiving proper voltages. If the

Input Power LED is extinguished:

1. Inspect the power cords and connectors. Is the cord unplugged? Is the cord or connector damaged?

• Yes—Make necessary corrections or repairs. If the condition remains, continue.

•No—Continue.

2. Inspect the AC power source. Is the power source delivering the proper voltage?

•Yes—Continue.

• No—Make necessary repairs. If the condition remains, contact your authorized maintenance

provider.

1 Input Power LED 2 System Fault LED

3 Heartbeat LED

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 71 72

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Compaq 8/20q Spezifikationen Seite 41