System information

Dell
PowerEdge M1000e Technical Guide 16
4.9 Fans
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Figure 7. Back View of Chassis Showing Fans
The PowerEdge M1000e chassis comes standard with nine 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 the following:
• 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
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
throttled back by that server if they reach a thermal threshold and then shut down if a critical over-
temperature threshold is met.