According to one embodiment, a magnetic disk drive includes a disk including a plurality of servo areas for detecting a positioning error, a head to write and to read data, and a processor. The machine tool comprises: a column movable along the X-axis on a bed ; a main spindle supported by the column via a spindle head and vertically movable along the Y-axis; and a rotatable table which is movable back and forth with respect to the main spindle along the Z-axis on the bed. The first, non-Si, nanosheet FETs may define a critical speed path of the circuit of the integrated circuit. A flexible shutter is connected to the carrier frame. The controller of interprets a brake pedal position signal from the brake pedal position sensor to determine the position of the brake pedal.