IBM pSeries 690 Service Manual page 60

v CEC RIO-2 ports can be connected to RIO and RIO-2 I/O planars with appropriate cables in one planar
loop or two planar loops in the following order:
1. Cable any I/O subsystems with RIO I/O planars in both the left and the right positions with 2 I/O
planar loop connections. The maximum data rate for each RIO I/O planar is 500 MB per second.
2. Cable any I/O subsystems with RIO-2 I/O planars in both the left and right positions with 2 I/O
planar loop connections. The maximum data rate for each RIO-2 I/O planar is 1 GB per second.
3. Cable any I/O subsystems with a RIO I/O planar in one side and a RIO-2 I/O planar in the other
side with 1 I/O planar loop connection.
The maximum data rate for the RIO I/O planar is 500 MB per second, and for the RIO-2 I/O planar,
the maximum data rate is 2 GB per second. However, in the event of a cable failure, there is no
redundant path for the 2 GB per second RIO-2 I/O planar. Restoring the redundant path for the
RIO-2 planar reduces the data rate to 1 GB per second. I/O subsystems with a RIO I/O planar in
one side and a RIO-2 I/O planar in the other side with 2 I/O planar loop connections are not
allowed.
4. Cable any I/O subsystems with RIO-2 I/O planars in both the left and the right positions with one I/O
planar loop connections. The maximum data rate for each RIO-2 I/O planar is 1 GB per second with
data path redundancy, or 2 GB per second without data path redundancy.
Note: If all I/O planars are connected to the CEC with one I/O planar loops, the maximum number of I/O
subsystems connected to the system is reduced to seven.
44 Eserver pSeries 690 Service Guide