System information

52 Logical Partitions on System i5
The vertical USB port to the right of the HMC ethernet ports is not available for use.
The HMC 1 and 2 ports on the rear of the HMC system unit connect to the Service Processor
HMC ports 1 and 2. But only one cable should be connected at one time. The service
process would have major problems if both cables were to be connected between the ports.
See Figure 3-7.
Notice that on the rear of the 570, there is a pair of SPCN cables. These are connected to
external towers for power control. SPCN cables are connected in a loop on System i5
systems. In previous iSeries and AS/400 servers, the SPCN cables were always daisy
chained.
Figure 3-7 Rear of Model 570
Notice the large dark connector on the lower right hand side of the image (below the
right-hand fan). This is the system interconnect port for connecting other 570 nodes.