PS4100 Hardware Maintenance Guide
Maintaining Control Modules
19
Table 5 Ethernet and Management Port LED Descriptions
Table 6 Control Module Status LED Descriptions
Identifying Control Module Failures
You can identify a failure in a control module by:
•
LEDs
on the control module itself. See
Interpreting Control Module LEDs on page 18
.
•
Messages
on the console, in the event log, or in the Group Manager GUI Alarms panel.
•
Group Manager GUI and CLI output.
The Member Controllers window or the
member select show
controllers
command output shows the control module status
not installed
.
When viewed from the rear of the array, CM0 is on the top, and CM1 is on the bottom. See
Features and Indicators on page 3
. If a control module fails, contact your PS Series support provider for a
replacement.
Understanding Failover Behavior
In a dual control module array, only one control module is active (serving network traffic) at one time. Each
control module includes a cache-to-flash module for storing recently-used data.
For redundancy, the cache on the secondary control module mirrors the data that is stored in the cache on
the active control module.
The active control module can use network interfaces on the secondary control module if there is a cable
connected from the corresponding port on the secondary control module to a network switch. Therefore, you
should connect cables to all the network interface ports on each control module to make sure that both
control modules can access an interface.
LED Location
State
Description
Left
Off
No power or not connected to network.
On
Connected to network.
Right
Off
No power, not transmitting, or not receiving.
On
Transmitting or receiving.
LED Name
State
Description
PWR
Off
No power.
On (steady green) Power/OK.
ACT
Off
No power, secondary control module is not synchronized with
active control module, or error condition.
Steady green
Active control module (serving network I/O).
Steady amber
Secondary control module. Cache is synchronized with active
control module.
ERR
Off
Normal operation or no power.
Steady red
Array is starting up or error condition.
Blinking red
Array is entering power standby mode because the Standby On/
Off button was pressed.
Summary of Contents for PS4100
Page 1: ...PS4100 Hardware Maintenance Guide Version 1 0 ...
Page 6: ......
Page 22: ...PS4100 Hardware Maintenance Guide Maintaining Drives 16 ...
Page 34: ...PS4100 Hardware Maintenance Guide Maintaining Control Modules 28 ...
Page 40: ...PS4100 Hardware Maintenance Guide Maintaining Power Supply and Cooling Modules 34 ...
