Superdome Servers - I/O Expansion Cabinet Guide, Fifth Edition

Chapter 3
Installing the IOX
Connecting the IOX to the Superdome
65
IMPORTANT Do not remove any black or grey cable ties.
Figure 3-26 Remove and Discard Green VELCRO Ties
There are optional brackets for retaining cables in the cable routing channel at the rear of the extension and
additional holes for attaching cable ties in the routing channel.
REO cables run through one of the side bulkheads secured by cable clamps, or R-PECs, run through the
cutout in the IOX side, and connect to the XUCB in the Superdome cabinet. The GSP bus cables run from the
rear of the XUC, through the bulkhead secured by cable clamps, or U-PECs, into the Superdome cabinet and
connect to the Superdome backplane,
The Superdome 32 Way cabinet supports two ICEs. Therefore, only one IOX cabinet is required. Figure 3-27
shows a typical arrangement of a Superdome 32 Way server and one IOX cabinet. The Superdome 64 Way
server (two connected Superdome 32 Way cabinets) can have from one to four ICEs connected to it and one or
two adjacent IOX cabinets. Figure 3-28 and Figure 3-29 show examples of Superdome 64 Way servers and
their adjacent IOX cabinet(s).
REO and GSP bus cables runs can be “long” or “short,” depending on the IOX and server arrangement.
Examples of short REO cable runs are:
• In Figure 3-27, all cables running from the IOX to the server cabinet adjacent to it.
• In Figure 3-28, the cables from IOX cabinet 8 running to the adjacent server cabinet n. This is the
“unbalanced” case.
• In Figure 3-29, the cables from IOX cabinet 8 running to the adjacent server cabinet n and the cables
running from IOX cabinet 9 to server cabinet n+1. This is the “balanced” case.