IBM Power System E850C Technical Overview And Introduction page 78

Recommendation: Locate any attached PCIe Gen3 I/O Expansion drawer in the same
rack as the POWER8 server for ease of service. However, the drawers can be installed in
separate racks if the application or other rack content requires it. Generally, use 3 m cables
for PCIe drawers in the same rack as the system unit and 10 m cables for drawers that are
in a different rack.
A minimum of one PCIe3 Optical Cable Adapter for PCIe3 Expansion Drawer (#EJ08) is
required to connect to the PCIe3 6-slot Fan Out module in the I/O expansion drawer. The top
port of the fan-out module must be cabled to the top port of the #EJ08 port. Likewise, the
bottom two ports must be cabled together:
1. Connect an active optical cable to connector T1 on the PCIe3 optical cable adapter in your
server.
2. Connect the other end of the optical cable to connector T1 on one of the PCIe3 6-slot Fan
Out modules in your expansion drawer.
3. Connect another cable to connector T2 on the PCIe3 optical cable adapter in your server.
4. Connect the other end of the cable to connector T2 on the PCIe3 6-slot Fan Out module in
your expansion drawer.
5. Repeat the preceding four steps for the other PCIe3 6-slot Fan Out module in the
expansion drawer, if required.
Figure 2-18 shows connector locations for the PCIe Gen3 I/O expansion drawer.
Figure 2-18 Connector locations for the PCIe Gen3 I/O expansion drawer
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IBM Power System E850C: Technical Overview and Introduction