Full-Drawer Cabling - IBM p5 590 System Handbook

For the 9119-595 FC 3170 (8.0 m) can only be used to connect
FC 5791/5794 risers that are in either a FC 5792 frame or the FC 8691 frame
bolted to the FC 5792 frame to the GX+ adapters in a processor book.
I/O drawer RIO-2 cables are no longer than 8 m.
For GX+ adapters to I/O drawer cabling, the first I/O drawer is connected to
the first GX+ adapter. The second I/O drawer to the next available GX+
adapter. All double-looped drawers will be connected first and then the
single-looped.
The RIO-2 cabling is GX+ adapter port 0 to I/O drawer riser port 0 and GX+
adapter port 1 to I/O drawer port 1.

2.7.3 Full-drawer cabling

For an I/O drawer, the following connections are required.
One cable from the P1 RIO-2 Riser card J0 to CEC I/O card Px-Cx-T1.
One cable from the P2 RIO-2 Riser card J1 to CEC I/O card Px-Cx-T2.
These cables provides a data and communication path between the memory
cards and the I/O drawers (Figure 2-11).
A cable is also added between P1 RIO-2 Riser card J1 and P2 RIO-2 Riser
card J0 in each drawer.
This cable ensures that each side of the drawer (P1 and P2) can be accessed
by the CEC I/O (RIO-2 adapter) card, even if one of the cables are damaged.
Each half of the I/O drawer can communicate with the CEC I/O card for its
own uses or on behalf of the other side of the drawer.
There is an identifier (ID) in the cable plugs which gives the length of the cable to
the Inter-Integrated Circuit (I2C) bus and the service processor.
The cable ID is the function that verifies the length of the RIO-2 cable. There are
different RIO-2 cables, because we use CEC frame, powered 24 inch A frame,
and unpowered 24 inch Z frame for the I/O drawer. With the cable ID we calculate
the length and the link speed for the RIO-2 cable.
IBM Eserver p5 590 and 595 System Handbook
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