Figure 6. Back Of Enclosure - Dell PowerEdge M1000e Technical Manual

Fans
The PowerEdge M1000e chassis comes standard with nine hot-plug, redundant fan modules that
are distributed evenly across the back of the enclosure as shown in Figure 7. The speed of each fan
is individually managed by the CMC. Together, these design innovations provide the following:

Significant power savings as compared to older servers

Less airflow required as compared to the same number of similarly configured 1U servers

Similar sound-level as compared to previous servers
A similar acoustic profile as compared to previous servers, fans are N+1 redundant, meaning that
any single fan can fail without impacting system uptime or reliability. In the event of a fan failure,
system behavior is dependent on the resultant temperatures of the system, as monitored by the
server module iDRAC with Lifecycle Controller and I/O modules. The CMC continues to interpret
the airflow needs of each server and I/O module to control the fan speeds appropriately.
The system will not ramp the fans to full speed in the event of a fan failure unless deemed necessary
by onboard monitoring. Failure of more than one fan will not automatically result in shutting down
the blade servers because they have their own self-protection mechanisms to prevent them from
running too hot. The result of a failure of multiple fans would depend on the configuration, ambient
temperature, and workload being run. For example, the processors within a blade are automatically
PowerEdge M1000e Technical Guide
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Figure 6. Back of enclosure