Heat Dissipation; Figure 23. Server Cooling Air Profile - Dell PowerEdge M1000e Technical Manual

DC power consumption
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Error status
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Individual Status Signals from the power supply to the CMC
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AC Good
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DC Good
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PSU Present Alert
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VMware has included consuming the current power consumption and current power cap/limit
retrieval through Dell-specific IPMI commands through iDRAC. They are using this to report the
total power consumed by the server and also using this as part of their calculations to
determine/approximate the VM-level power. Unfortunately, there is no integration as yet of
generating the view/consolidation of power attributes across all the blades in a chassis, such as a
chassis view; or the ability make use of that knowledge (available through SMBIOS structures) to
make use of that in DPM/DRS or other tools/applications.
For more information, see the
Dell.com/Support/Manuals.

Heat dissipation

The cooling strategy for the M1000e supports a low-impedance, high-efficiency design philosophy.
Driving lower airflow impedance allows the M1000e to draw air through the system at a lower
operating pressure and reduces the system fan power consumed to meet the airflow requirements
of the system.
The low impedance design is coupled with a high-efficiency, air-moving device designed explicitly
for the PowerEdge M1000e chassis. The efficiency of an air-moving device is defined as the work
output of the fan as compared to the electrical power required to run the fan. The M1000e fan
operates at extreme efficiencies, which correlates directly into savings.
The high-efficiency design philosophy also extends into the layout of the subsystems within the
M1000e. The server modules, I/O modules, and power supplies are incorporated into the system
with independent airflow paths. This isolates these components from pre-heated air, reducing the
required airflow consumptions of each module.
The server modules are cooled with traditional front-to-back cooling. As shown in Figure 23, the
front of the system is dominated by inlet area for the individual server modules. The air passes
PowerEdge M1000e Technical Guide
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Dell Chassis Management Controller Firmware User's Guide

Figure 23. Server cooling air profile

on