
Chapter 3: Subsystem Monitoring
Status-indicating LEDs
3-3
3.2 Status-indicating LEDs
3.2.1 Brief Overview of the LEDs
The following devices come with LEDs that inform subsystem managers about the
operational status of the component on which they are mounted. The subsystems feature
status-indicating LEDs distributed over the active components in the following ways:
Component LED(s) per Unit Total LEDs Definition
Drive Trays
2 24 – 12 bay
16 – 8 bay
See Section 3.2.5
Controller Module
5 5 See Section 3.2.2
Ethernet Ports
2 2 See Section 3.2.3
BBU Module (if BBU
is installed)
1 1 See Section 3.2.8
PSU Module
1 2 See Section 3.2.6
LCD Keypad Panel
3 3 See Section 3.2.4
Cooling Module
1 3 – 12 bay
2 – 8 bay
See Section 3.2.7
Table 3-1: LED Distribution
3.2.2 Controller Module LEDs
The rear-facing faceplate of the controller module is shown in Figure 3-1. The relative
locations of LEDs are the same on either the GHDX-2422S-8F4D or the GHDX-2422S-
12F4D. The LEDs are numbered from 1 to 5. There are two more LEDs on the Ethernet
port. The LED definitions are shown in Table 3-2 below.
The two models’ rear-facing faceplates look identical.
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