A SERVICE OF

logo

Chapter 2 System Features 2-3
2.1.4 System Bus
The CMU containing a CPU and memory subsystem and each component in an IOU
containing an I/O subsystem are used for high-throughput data transfer between all
components through a crossbar switch. The crossbar switch has duplicated bus
routes. If one crossbar switch has an error, the system can be restarted to isolate the
faulty switch, enabling the high-end servers to continue operation.
FIGURE 2-1 shows data transfer in the system.