Specifications

PS4000 Hardware Maintenance Maintaining Control Modules
3–2
module. If the active control module fails, the secondary will take over network
operations.
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.
Interpreting Control Module LEDs
Control modules have the following LEDs:
• On the left side of each control module, three LEDs enable you to determine
the control module status and whether the control module is active or
secondary. See Figure 3-1 and Figure 3-2.
• Each Ethernet port has two LEDs that show the network interface status. See
Figure 3-1 and Figure 3-2.
Control module LEDs are described in Table 3-1. Ethernet port LEDs are
described in Table 3-2.
Table 3-1: Control Module LED Descriptions
LED Location Color Description
ACT LED Off No power, secondary control module is not
synchronized with active control module, or error
condition.
Green Active control module (serving network I/O).
Orange Secondary control module. Cache is synchronized
with active control module.
ERR LED Off Normal operation or no power.
Red Array is starting up or error condition.
PWR LED Off No power.
Green Power.