Patent ID: 7120016

Claim:
A disk array device comprising: a plurality of hard disk drive modules each having a disk drive for recording data; a controller module having a controller that sends/receives data to/from an external information processing device and controls writing/reading data into/from the disk drives; a power supply module that supplies power to the plurality of hard disk drive modules and the controller module; a plurality of fan modules having respective fans that cool the plurality of hard disk drive modules, the controller module, and the power supply module; a circuit board connected via connecters provided on one surface thereof to the plurality of hard disk drive modules and connected via connecters provided on an other surface thereof to the controller module, the power supply module, and the plurality of fan modules; and a casing-like chassis having at least four surfaces and housing the circuit board, the plurality of hard disk drive modules provided on the one surface's side of the circuit board, and the controller module, the power supply module, and the plurality of fan modules provided on the other surface's side of the circuit board, wherein the controller module and the power supply module are provided in between the fan modules, and wherein the power supply module has first air holes used to allow cooling air to flow in directions toward the fan modules.