Airflow management system for cabinet having field replaceable units

A storage rack for supporting a plurality of field replaceable units (FRUs), comprising:

• a framework comprising a first end portion, an opposing second end portion, a plurality of side portions extending between the first and second end portions, and a storage area between the top end portion, the bottom end portion, and the plurality of side portions;
• a plurality of receiving bays disposed between the first and second end portions of the framework within the storage area, wherein each of the receiving bays comprises a front portion adjacent a first of the plurality of side portions of the framework, a rear portion adjacent an opposing second of the plurality of side portions of the framework, and a receiving space between the front and rear portions for receiving a FRU via the front portion;
• and
• a plurality of airflow restriction devices secured to the framework, wherein each of the airflow restriction devices is secured adjacent a respective one of the plurality of receiving bays, wherein each of the airflow restriction devices moves between at least a deployed position that restricts airflow through the receiving space of a respective receiving bay in the absence of a FRU in the receiving bay and a retracted position in the presence of a FRU in the receiving bay, and wherein each of the airflow restriction devices automatically moves to the retracted position during insertion of a FRU into the receiving space of a corresponding receiving bay via the front portion of the receiving bay.