Figure 10. 2U expansion enclosure—rear panel components
1. PCM 0
2. IOM A
3. PCM 1
4. IOM B
2U enclosure rear panel components
This section describes the controller module, expansion enclosure IOM, and power cooling module components for 2U
enclosures.
Controller module
The top slot for holding controller modules is designated slot A, and the bottom slot is designated slot B. The face plate details
of the controller modules show a module aligned for use in slot A. In this orientation, the controller module latch is shown at the
bottom of the module and it is in a closed/locked position. See
12 Gb/s controller module LEDs
Figure 11. Controller module details
1. Host ports
2. USB serial port (service only)
3. USB serial port (CLI)
4. Ethernet port for management network
5. SAS expansion port
Expansion enclosure IOM
The following figure shows the IOM used in supported expansion enclosures for adding storage. Ports A/B/C ship configured
with 12 Gb/s mini-SAS HD (SFF-8644) external connectors. See
for a description of LED behavior.
Figure 12. Expansion enclosure IOM details
1. 3.5 mm serial port (service only)
2. SAS expansion port A
3. SAS expansion port B (disabled)
4. SAS expansion port C
5. Ethernet port (disabled)
Storage system hardware
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