IBM DCS9550 1S1 manual SCM I/O Module LEDs, Audible Alarm Mute

Troubleshooting and Problem Solving

4.3.3SCM I/O Module LEDs

The SCM I/O module LEDs are shown in Table 4–3.

Table 4–3SCM I/O Module LEDs

LED	Definition	Color	Normal	Fault
			Status	Status
FC Host Port 0	Incoming FC signal is GOOD	Green	On
Signal Good	No connection or incorrect connection			Off
	Invalid SFP connection			Flashin
				g
FC Host Port 1	Incoming FC signal is GOOD	Green	On
Signal Good	No connection or incorrect connection			Off
	Invalid SFP connection			Flashin
				g
Router Status	Storage Router Device Ready	Green	On
	Storage Router Device not ready or			Off
	defective
ESI/SCM	Fault present (also On when booting)	Amber	On
Module Fault	Successful controller initialization			Off

4.4Audible Alarm

The Ops Panel also includes an Audible Alarm which indicates when a fault state is present. The following conditions will activate the Audible Alarm:

•Drive Fault

•Fan Fault

•Voltage out of range

•Thermal overrun

•System fault

4.4.1Audible Alarm Mute

When the Audible Alarm sounds, it may be muted by pressing the Alarm Mute push-button. Automatic muting will take place after two minutes if the mute switch is not manually operated. The Alarm Mute push-button is located above the indicators on the Ops Panel (see Figure 4–1). When the alarm is muted, it will continue to sound with short intermittent bleeps to indicate that a problem still exists. It will be silenced when all problems are cleared. (See also Thermal Shutdown states, Section 4.5.5).

LED Test Mode

The Alarm Mute push-button can also be used to test the LEDs on the Ops Panel. When the Mute push-button is held, all LEDs will be illuminated if there are no faults present.

IBM System Storage DCS9550 1S1 Storage Expansion Unit Installation, Service, and User Guide 41