Patent ID: 8462502

Claim:
A storage device mounting structure comprising: a unit for housing at least one RAID group comprising a plurality of storage devices, the unit comprising at least one fan for cooling the at least one RAID group; a chassis for housing the unit; a guide mechanism for supporting the unit and guiding it into and out of the chassis; wherein the unit has an open area through which the plurality of storage devices are configured to be inserted from a front face of the unit into the unit; and the guide mechanism is configured to support the unit to freely move rotationally to make a surface of the unit, where the open area exists, positioned at the front of the chassis; and a controller for controlling a rotational speed of the at least one fan, wherein the controller is configured to increase the rotational speed when an access frequency of the at least one RAID group exceeds a predetermined threshold, wherein the predetermined threshold is set higher when the at least one RAID group is configured with hard disk drives (HDDs) than when the at least one RAID group is configured with solid state drives (SSDs).