A chassis input/output (I/O) module adapted to be removably installed onto a mass storage chassis assembly carrying one or more mass storage sub-assemblies, the chassis input/output (I/O) module comprising: an I/O module shell; a main I/O connector externally available on the I/O module shell; a plurality of sub-assembly connectors externally available on the I/O module shell and configured to engage sub-assembly connectors of the one or more mass storage sub-assemblies installed in the mass storage chassis assembly; one or more power supply modules positioned within the I/O module shell; and an interface module positioned within the I/O module shell and electrically coupled to the main I/O connector, the plurality of sub-assembly connectors, and the one or more power supply modules, with the interface module configured to: regulate operations of the one or more mass storage sub-assemblies installed in the mass storage chassis assembly; regulate provision of electrical power from the one or more power supply modules to the one or more mass storage sub-assemblies; facilitate exchange of electrical signals between the one or more mass storage sub-assemblies and the main I/O connector; and regulate provision of electrical power from the one or more power supply modules to one or more cooling fans to cause the one or more cooling fans to create a cooling airflow to flow toward the one or more mass storage sub-assemblies after passing through the I/O module shell. an I/O module shell; a main I/O connector externally available on the I/O module shell; a plurality of sub-assembly connectors externally available on the I/O module shell and configured to engage sub-assembly connectors of the one or more mass storage sub-assemblies installed in the mass storage chassis assembly; one or more power supply modules positioned within the I/O module shell; and an interface module positioned within the I/O module shell and electrically coupled to the main I/O connector, the plurality of sub-assembly connectors, and the one or more power supply modules, with the interface module configured to: regulate operations of the one or more mass storage sub-assemblies installed in the mass storage chassis assembly; regulate provision of electrical power from the one or more power supply modules to the one or more mass storage sub-assemblies; facilitate exchange of electrical signals between the one or more mass storage sub-assemblies and the main I/O connector; and regulate provision of electrical power from the one or more power supply modules to one or more cooling fans to cause the one or more cooling fans to create a cooling airflow to flow toward the one or more mass storage sub-assemblies after passing through the I/O module shell. regulate operations of the one or more mass storage sub-assemblies installed in the mass storage chassis assembly; regulate provision of electrical power from the one or more power supply modules to the one or more mass storage sub-assemblies; facilitate exchange of electrical signals between the one or more mass storage sub-assemblies and the main I/O connector; and regulate provision of electrical power from the one or more power supply modules to one or more cooling fans to cause the one or more cooling fans to create a cooling airflow to flow toward the one or more mass storage sub-assemblies after passing through the I/O module shell.