Air circulation system for redundant arrays of inexpensive disks and method of controlling air circulation

摘要

An air circulation system for an RAID system, having fan motors driving fans for circulating air inside the RAID and a power supply for the fan motors, includes: a sensing circuit for producing electrical signals proportional to the environmental conditions of the RAID's interior; a controller for producing control signals for controlling the direction of rotation of the fan motors when the signal exceeds a preset reference value; and a switching circuit for changing the polarity of the power supply, and thus the direction of rotation of the fan motors, in response to control signals from the controller.