Abstract: To manufacture a perpendicular magnetic recording-type magnetic tape having a servo signal written therein by a write head having a magnetic gap, a perpendicular direct-current erasing step in which a magnetic tape is magnetized in one direction that is one of two opposite thickness directions of the magnetic tape is performed before a signal writing step in which a servo signal is written in the magnetic tape by outputting a pulsed signal to the write head.

Abstract: A servo signal in which a magnetic pattern composed of a first portion magnetized in one direction that is one of two opposite thickness directions and a second portion magnetized in a direction opposite to the one direction is repeatedly arranged in a longitudinal direction of the tape at predetermined intervals is read out and a waveform of the servo signal is acquired from the readout servo signal. In the acquired waveform of the servo signal, a unit waveform having a pair of peaks of opposite polarities corresponding to the magnetic pattern appears periodically. A crest or trough portion of the waveform containing one of the peaks located rearwardly in the tape transport direction in a time of writing the servo signal is selected from the unit waveform contained in the acquired waveform of the servo signal. Tracking control or servo signal verification is performed based on the selected portion.

Abstract: To manufacture a perpendicular magnetic recording-type magnetic tape having a servo signal written therein by a write head having a magnetic gap, a perpendicular direct-current erasing step in which a magnetic tape is magnetized in one direction that is one of two opposite thickness directions of the magnetic tape is performed before a signal writing step in which a servo signal is written in the magnetic tape by outputting a pulsed signal to the write head.

Abstract: A servo signal in which a magnetic pattern composed of a first portion magnetized in one direction that is one of two opposite thickness directions and a second portion magnetized in a direction opposite to the one direction is repeatedly arranged in a longitudinal direction of the tape at predetermined intervals is read out and a waveform of the servo signal is acquired from the readout servo signal. In the acquired waveform of the servo signal, a unit waveform having a pair of peaks of opposite polarities corresponding to the magnetic pattern appears periodically. A crest or trough portion of the waveform containing one of the peaks located rearwardly in the tape transport direction in a time of writing the servo signal is selected from the unit waveform contained in the acquired waveform of the servo signal. Tracking control or servo signal verification is performed based on the selected portion.