77
Five Acoustic Optimization states can be selected. Use the one that best balances
performance requirements with the noise level of the fans.
Chassis level CFM usage is available to you for planning purposes. In addition, ambient
health awareness can detect potential hot air recirculation to the chassis.
4.7 Power supply and fan module requirements
The number of fan modules and power supplies required is dependent on the number of
nodes installed within a chassis and the level of redundancy required.
When installing additional nodes, install the nodes, fan modules, and power supplies from the
bottom upwards.
4.7.1 Fan module population
The fan modules are populated dependent on nodes installed. To support the base
configuration and up to four nodes, a chassis ships with four 80 mm fan modules and two 40
mm fan modules preinstalled.
The minimum configuration of 80 mm fan modules is four, which provides cooling for a
maximum of four nodes. This configuration is shown in Figure 4-21 and is the base
configuration.
Figure 4-21 Four 80 mm fan modules allow a maximum of four nodes installed
Front View Rear View
Cooling zone Cooling zone
12
34
Node Bays
1
5
11
7
13
9
2
10
3 4
6
14
12
8
1
2
3
4
6
7
8
9
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