206  IBM DS8900F Architecture and Implementation The MC itself consists of a small form factor (SFF) personal computer. The use of an SFF  personal computer makes the MC efficient in many ways, including power consumption. The  management console is also referred to as the Hardware Management Console (or HMC). It  supports the DS8900F hardware and firmware installation and maintenance activities. Because of the small width, both primary and secondary MCs are mounted in the front of the  ME next to each other. There is an 1U keyboard and display tray available. For racked models 996 and 994 it is  required to order one.The Feature Code to order it is FC1765. For the flexibility class rack  mounted model 993, it is optional. For this model there is no need to order 1U  keyboard/display if the keyboard/display of the IBM Z or LinuxONE rack or the  keyboard/display of the customer provided rack is available. The ME provides internal communications to all of the modules of the DS8900F system. It  also provides external connectivity using two ethernet cables from each HMC for remote  management, and provides keyboard/mouse and video connectivity from each HMC for local  management. Cables are routed from the management consoles to the rear of the  management enclosure through a cable management arm (CMA). Figure 8-2 shows the layout of the components of the management enclosure. Figure 8-2 Management Enclosure component layout 8.1.2 Management Console hardware 8456ch_DS_HMC_Plan.fm Draft Document for Review December 5, 2019 4:33 pm