Patent ID: 7369406

Claim:
A disk array apparatus comprising: a casing having an inlet on one side and an outlet on the other side; a disk drive group configured by a plurality of disk drives that are arranged on one side in said casing; a controller unit configured by a plurality of circuit substrates that are arranged on the other side in said casing; and a plurality of cooling fans for ventilating said disk drive group and said controller unit, wherein: said plurality of cooling fans are arranged between said disk drive group and said controller unit in said casing and are provided while being aligned so as to draw in cooling air from the side of said disk drive group and makes the cooling air flow to the side of said controller unit; and backflow prevention members are provided so as to protrude on the side of said disk drive group or on the side of said controller unit from between said cooling fans while extending so as to define a space on the inlet side or on the outlet side of the cooling fans.