IBM DCS9550 1S1 - Manual (Page 56)

Troubleshooting and Problem Solving
IBM System Storage DCS9550 1S1 Storage Expansion Unit Installation, Service, and User Guide 41
4.3.3 SCM I/O Module LEDs
The SCM I/O module LEDs are shown in Table 4–3 .
4.4 Audible 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
4.4.1 Audible 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.
Table 4–3 SCM I/O Module LEDs
LED Definition Color Normal
Status
Fault
Status
FC Host Port 0
Signal Good Incoming FC signal is GOOD
No connection or incorrect connection
Invalid SFP connection Green On
Off
Flashin
g
FC Host Port 1
Signal Good Incoming FC signal is GOOD
No connection or incorrect connection
Invalid SFP connection Green On
Off
Flashin
g
Router Status Storage Router Device Ready
Storage Router Device not ready or
defective Green On
Off
ESI/SCM
Module Fault Fault present (also On when booting)
Successful controller initialization Amber On
Off