作者: Hiromichi Ishibashi , Mitsurou Moriya , Shinichi Kadowaki , Shinichi Tanaka
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摘要: A disk-shaped recording medium includes a plurality of first tracks and second for data, the track being alternately arranged in radial direction on surface one pattern concentric circles spiral pattern; servo areas discretely located at respective specified rotation angular positions along circumferential medium; marks used tracking control. The are provided each tracks, tracks.