IBM pSeries 690 Service Manual page 66

I/O Subsystems (1 Through 4 without IBFs) RIO-2 Cabling to I/O
Books, Two I/O Planar Loop Configuration, 2, 3, or 4 MCMs Only
Note: The following figure applies to CECs with RIO-2, or bayonette retention, connections.
1 Primary Rack
2 Primary I/O Book
3 Third I/O Subsystem
4 Second I/O Subsystem
50 Eserver pSeries 690 Service Guide
7
D1
D0
C1
C0
6
1
0
5
1
0
4
1
0
3
1
0
1
A0
A1
2
B0
B1
1
0
1
0
1
0
1
0
5 First I/O Subsystem
6 Fourth I/O Subsystem
7 Secondary I/O Book