Fans; Figure 10. Rear View Showing Fans - Dell PowerEdge M1000e Technical Manual

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Fans

The PowerEdge M1000e chassis comes standard with 9 hot-swappable, redundant fan modules that
are distributed evenly across the enclosure. The speed of each fan is individually managed by the
CMC. Together, these design innovations can provide:
•
Significant power savings as compared to older servers
•
Less airflow required as compared to the same number of similarly configured 1U 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 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 on‐board monitoring. Failure of more than one fan will not automatically result in shutting down
of blade servers. This is because the blade servers 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 throttled back by that server if they reach a thermal threshold and then shut
down if a critical over-temperature threshold is met.
PowerEdge M1000e Technical Guide
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Figure 10. Rear View Showing Fans

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