Patent ID: 7911789

Claim:
A disk array system provided with a group of storage devices and a controller for controlling these devices, comprising: a basic chassis having openings in front and rear surfaces thereof and a backboard fixed at a midpoint in its interior; and a plurality of storage device modules, at least one controller module and two duplicated power source modules as modules installed by insertion/removal and fixation to a front part and a rear part of the backboard, wherein the controller module contains a controller substrate and a flow path is closed at a rear side surface of the chassis, and the power source module contains a power source unit and a fan unit disposed close to the rear side surface of the chassis at the back of the power source module and an exhaust hole area is provided in a rear side surface of the chassis, the plurality of storage device modules are installed in the front part, the two power source modules are installed in areas close to left and right side surfaces of the chassis in the rear part, and the controller module is disposed in areas between the two power source modules, a ventilation structure for cooling air between the controller module and the two power source modules is provided at positions near the fan units at the back of the power source modules, and by operation of the fan unit, cooling air taken from the chassis front surface in the front part passes through the storage device modules and is then supplied to the rear part through an opening hole of the backboard, and in the rear part, one first cooling air flows into the controller module and the other second cooling air flows into the two power source modules, and the first cooling air passes through an area of a plurality of cooling object components on the controller substrate in the controller module and flows into a vicinity of the fan units in the power source modules through the ventilation structure and is then drawn by the fan units, and the second cooling air passes through the power source units in the power source modules and is drawn by the fan units at the back thereof and is then exhausted outside from an area of the exhaust hole in the chassis rear side surface of the power source modules by the fan units.