Data processing system storage unit, data processing system cooling apparatus and data processing system

A data processing system storage unit for storing a plurality of data processing systems, comprising:

• a plurality of storage spaces, wherein each storage space is configured for storing a data processing system;
• an air inlet duct and an air outlet duct;
• a plurality of inlet conduits, wherein each inlet conduit is configured for connecting the air inlet duct to an inlet port of a data processing system;
• a plurality of outlet conduits, wherein each outlet conduit is configured for connecting the air outlet duct to an outlet port of a data processing system, and wherein the inlet port and the outlet port are located on substantially different faces of the data processing system and are substantially diagonally opposite each other;
• at least one valve for substantially closing at least one of the inlet port and the outlet port, wherein the at least one valve is coupled to the at least one of the inlet port and the outlet port from within the data processing system, the at least one valve comprising a first sealing valve for closing the inlet port and a second sealing valve for closing the outlet port, wherein the first valve is coupled to the inlet port from within the data processing system, and the second valve is coupled to the outlet port from within the data processing system, and the first and second sealing valves are powered by fan headers within the data processing system;
• and
• a primary air transfer system for at least one of directing air into the air inlet duct and extracting air from the air outlet duct.