Maintaining Control Modules; Identifying The Control Module; Interpreting Control Module Leds - Dell EQUALLOGIC PS6500 Hardware Manual

3 Maintaining Control Modules

A PS6500 array includes two hot-swappable control modules. One functioning control module is required for array
operation. You access control modules from the rear of the array.
Each control module includes:
• Four Ethernet ports, one of which can be used as a dedicated management port if you configure a management
network
• A serial connector (for use if there is no network access to the array)
• A field-replaceable microSD card containing the PS Series firmware
Cache and NVRAM batteries are not field replaceable. If a control module fails, or for information about replacing
a cache or NVRAM battery, contact your PS Series service provider.
Only one control module is active (serving network traffic) at one time. The secondary (redundant) control module
mirrors cache data from the active control module. If the active control module fails, the secondary will take over
network operations.
Caution: Do not mix control module types in an array. Always make sure both control modules are the same
type and color. See the latest PS Series Release Notes for information about other supported control
modules.

Identifying the Control Module

The Type 7 control module has a green faceplate (Figure 3-1). When viewed from the rear of the array and from
left to right, control modules are numbered 0 and 1.

Interpreting Control Module LEDs

Control modules have the following LEDs:
• Between the serial port and the Ethernet ports, three LEDs show the control module status and whether the
control module is active or secondary. See Figure 3-1 and Table 3-1.
Figure 3-1: Type 7 Control Module
3–1