In a storage device incorporating a plurality of kinds of disk drives with different interfaces, the controller performs sparing on a disk drive, whose errors that occur during accesses exceed a predetermined number, by swapping it with a spare disk drive that is prepared beforehand. The controller calculates a correction control output value for the valve operated as the room pressure controlling valve, which is either the supply air valve or the common exhaust air valve, based on a setting value and a room pressure measured by the differential pressure sensor. A first measuring and fixing element is provided for measuring and fixing the knee with a transverse edge for the sides of the feet, together with a second measuring and fixing element for measuring and fixing the hips, and a third measuring and fixing agent element for measuring and fixing the shoulder region, are provided. The guide members thus position the conductors with respect to the core. In one embodiment, the charge sharing used by the DAC is executed by a holding capacitor and a sampling capacitor, and the holding capacitor and the sampling capacitor are formed using respective parasitic capacitance components existing in the at least two data lines, thereby reducing area and power consumption over an existing R-string type of DAC. A mouth ring of the toner container is provided with the sealing valve.