MAGNETIC RECORDER AND MAGNETOOPTICAL RECORDER

摘要

A virtual track in which the center (11) of rotation of a magnetic recording medium or a point in the vicinity thereof becomes the center of a data information track is set, and a positioning servo system is operated. Since this makes it unnecessary to faithfully follow a track center line defined by servo information recorded in advance on a magnetic recording medium or a magnetooptical recording medium, vibration synchronous with the rotation of a disk rarely occurs. Therefore, when the center (11) of rotation and the center (12) of a pattern deviate from each other, the occurrence of vibration synchronous with the rotation of a disk is prevented, whereby a magnetic recorder or a magnetooptical recorder in which the track accuracy of a magnetic head or a magnetooptic head is improved, is obtained. This enables the recording density to be further improved.