Patent ID: 7876556

Claim:
A disk array system, comprising: a storage device for storing data; and a control unit for controlling read and write of the data from and to said storage device, wherein said storage device has a box in which a plurality of memory disk units are stored, a first memory disk unit of said plurality of memory disk units is arranged on a first surface of the box while standing upright on an upstream side of cooling air and a second memory disk unit of said plurality of memory disk units is arranged on the first surface of the box while standing upright on a downstream side of the cooling air in said box, and said first memory disk unit and said second memory disk unit are arranged so as to have a difference in level therebetween, said first memory disk unit and said second memory disk unit each having at least one light emitting indicator disposed thereon and facing in the upstream direction, wherein said at least one light emitting indicators can be viewed simultaneously.