US Patent 9448601 Modular mass storage system with controller

A system for storing data includes a rack and one or more data storage modules coupled to the rack. The data storage modules may include a chassis, two or more backplanes coupled to the chassis, one or more mass storage devices coupled to the backplanes, and one or more data control modules mounted in one or more inlet air plenums extending upstream of one or more of the backplanes in the chassis interior. A data control module can be mounted in one or more air plenums extending beneath one or more of the backplanes in the chassis interior. A data control module can be mounted in one or more air plenums extending above one or more of the backplanes. A data control module mounted in a data storage module may access the mass storage devices in one or more of the data storage modules coupled to the rack.