Information handling system dynamic fan power management

摘要

Power resource allocation at a chassis that supports plural server information handling systems is enhanced with modifications to power consumption by plural cooling fans based upon available power resources. As available power decreases, at least some of the cooling fans operate at reduced speeds for a given thermal condition to consume less power. In one embodiment, a maximum allowed cooling fan speed is set with a delta value over the fan speed of one or more other cooling fans, such as a delta over the lowest commanded cooling fan speed of the chassis.

主权项

1. An information handling system comprising:
a chassis having plural slots, each slot operable to accept a server information handling system sled operable to process information; plural cooling fans disposed in the chassis and operable to provide cooling airflow to information handling system sleds coupled to the plural slots; a power subsystem disposed in the chassis and operable to power the plural cooling fans and server information handling system sleds coupled to the plural slots, the power subsystem providing power at plural power levels up to a maximum power level; and a fan controller interfaced with the plural cooling fans, the fan controller operable to command a fan speed for each of the plural cooling fans based upon one or more thermal measurements associated with each of the plural cooling fans and a fan speed configuration, the fan controller having a first fan speed configuration associated with a first power consumption level and a second fan speed configuration associated with a second power consumption level, the first and second fan speed configurations commanding first and second different fan speeds at common thermal measurement.