Chapter 2. Positioning 13 A chassis that includes shared fans and cooling.The n1200 Enclosure supplies the cooling and power to maximize energyefficiency, but leaves management and connectivity to the compute nodes,which minimizes cost. Cables, connectors, and controls at the front.With the exception of the power cords, all cabling is at the front of the chassis.All controls and indicators also are at the front. This configuration makesaccess, server swap-outs, and overall systems management easier.Each compute node has a front connector for a local console for use if youneed crash-cart access. Also, each compute node has a pull-out tab at thefront for system and customer labeling needs, as shown in Figure 2-2.Figure 2-2 Front of the IBM NeXtScale nx360 M4Because the cables do not clog up the back of the rack, air flow is improvedand thus energy efficiency also is improved. The harder the fans work tomove air through server, the more power they use.Your support staff who work in the data center can tell you the front of the rackis a much more enjoyable environment to spend time in because it mighteasily be 30°F (16°C) cooler at the front than at the back. People cannot stayin the rear of the rack that long before its no longer comfortable. Also, the frontof rack is less noisy than the rear of the rack because of fan noise.KVM portPull out label tab
