Redundant - HP Xw460c - ProLiant - Blade Workstation Overview

Figure 15. Airflow through the HP BladeSystem c7000 Enclosure – side view

Redundant

As illustrated in Figure 16, fans located in each of four cooling zones provide direct cooling for server
blades in their respective zones and redundant cooling for adjacent zones. Each zone can contain
four server blades. Full-height server blades couple the two vertical zones into a single zone, as in the
example in Figure 16 where a full-height server blade in bay 1 has resulted in zones 1 and 3
operating as a single zone. Fans 3 and 8, shown in the Figure 16 rear view, support two adjacent
horizontal zones and will operate at the higher speed of either of the two zones. If any fan fails, the
result is only a 10 to 25% loss in cooling capacity.
Figure 16. Four cooling zones in the c7000 enclosure
Zone cooling minimizes the power consumption of the fan subsystem by increasing fan efficiency in a
single zone if one of the server blades requires more cooling. This saves operating costs and
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