A rigid component is formed of a plurality of coupled cylinders. Since, however, a recording thin film is formed of a polycrystal but not a single crystal, a variation in resistance values occurs and a change in volume caused upon phase-transition has placed a limit on the number of times of readout of record. Substantially the entire bottom surface of the roller press can correspond to the suction base. The plane orthogonal to the gravity comprises two orthogonal axes orthogonal to the direction of gravity. The channel quality information is measured in the samples. The system can include a scan logic configured to scan the executable software code to determine an execution trigger point in the executable software code.