Abstract: A storage device that is communicably connected to a host computer includes a plurality of disk units for storing data from the host computer. Each of the disk units includes a plurality of hard disks and is connected to one of a plurality of ports. A plurality of disk unit control units control the plurality of disk units, and each of the disk unit control units includes a memory for temporarily holding data from the host computer. A plurality of control signal transmission cables transmit control signals from the disk unit control units to the disk units. At least one of the control signal transmission cables is connected to at least two of the disk unit control units and transmits different control signals to at least two of the disk units. This enables device miniaturization and reduced costs for the storage device without a drop in reliability, even when a variety of devices are mounted in a highly dense configuration.

Abstract: The object of the present invention is to enable device miniaturization and reduced costs for a storage device without a drop in reliability even when a variety of devices are mounted highly densely therein. In order to connect the disk control logic unit 49 and disk drive unit 1, a 2-port control signal cable (571, 57n), which has a constitution in which two port control signal cables (port control signal cable 56 and port control signal cable 58, port control signal cable 60 and port control signal cable 62, for example) of adjacent ports (port 0 and port 1, port n-1 and port n, for example) among (a plurality of) port control signal cables (56, 58, . . . , 60, and 62) are bundled to form one cable, is adopted.

Abstract: An azimuth determinating apparatus wherein the azimuth sensor is oriented to a specified direction, and the deviation of the two-component detection signals of the azimuth sensor from the pointing direction of the azimuth sensor are corrected by the adjustment of the two-component detection signals with the adjusting circuit in accordance with the indication on the amount of deviation indicated by the indicating circuit, whereby distortion of the output signals due to the residual magnetism of the azimuth sensor is corrected and the true azimuth can be determined.