Dell PS4100 Installationsanleitung PDF herunterladen (Seite 25)

PS4100 Hardware Maintenance Guide Maintaining Control Modules

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 Front-Panel

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.

Connected to network.

Right

Off

No power, not transmitting, or not receiving.

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.

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