Chapter 3. Product information 103
The x3850 X6 server supports three modes of redundancy based on the power supply
configuration, system load, and the Power Policy configuration controlled by the IMM:
Non-redundant
Fully system redundant
Redundant with reduced performance (throttling)
The IMM must be used to set and change the Power Policy and System Power
Configurations. The power configurations and policies can be changed via the web interface,
CIM, and ASU interfaces. These settings cannot be changed by UEFI. The default
configuration setting for both AC and DC models is Non-Redundant with Throttling enabled.
For more information about power supply redundancy and power supply installation order,
see 4.5, “Power advice” on page 113.
3.23 Fans and cooling
The x3850 X6 servers have two types of fans:
Up to ten hot-swap, counter rotating system fans, two fans (motors) per fan pack used for
Compute Books and Storage Book cooling. Two fan packs used for each Compute Book
cooling and are only installed when a corresponding Compute Book is installed. Two HDD
fan packs located in Primary I/O Book must always be installed for Storage Book cooling.
Power supply 1-4 internal fans, located at the rear of the power supply.
Figure 3-38 shows fan locations and numbering in the server.
Figure 3-38 Fan locations and numbering
Fan packs 1-8 are located in front of the Compute Books numbered left to right, looking at the
front of the server. Fan packs 9 and 10 are in the rear of the server, numbered left to right.
There are several fan zones:
Fan Zone 1 = fan packs 9 and 10 to cool the Storage Book
Fan Zone 2 = fan packs 1 and 2 controlled by the temperature readings near Compute
Book 1, ML2 slot, and PCIe slot 9.
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