Recording medium, a method for producing the same, a control method using the recording medium, and a recording/reproducing apparatus using the recording medium

A disk-shaped recording medium, comprising:

• a plurality of first tracks and a plurality of second tracks for recording data, the first tracks and the second tracks being alternately arranged in a radial direction on a surface of the recording medium in one of a pattern of concentric circles and a spiral pattern;
• a plurality of first servo areas and a plurality of second servo areas discretely located at a plurality of respective specified rotation angular positions of the surface along a circumferential direction of the recording medium to be disposed alternately with each other in the circumferential direction;
• a plurality of first servo marks and a plurality of second servo marks used for tracking control, each of said first and second servo marks including a pair of wobbled marks;
• and
• a plurality of clock marks used for synchronization, the clock marks being provided at an equal rotation angular interval along each of the first and second tracks in the first and second servo areas, wherein in the first servo areas the first servo marks are provided along each of the first tracks whereas no second servo marks are provided along the second tracks;
• in the second servo areas the second servo marks are provided along each of the second tracks whereas no first servo marks are provided along the first tracks,
• each of the paired wobbled marks is provided along the corresponding track, the paired wobbled marks being spaced each other along the corresponding track and displaced by a specific distance from the center of the corresponding track in opposite directions respectively, and
• the first servo areas are isolated from the second servo areas in the circumferential direction so that the first servo marks and the second servo marks are provided in the different servo areas from each other;
• and
• further including synchronization marks respectively provided at a plurality of specified angular positions along each of the first and the second tracks excluding the first and the second servo areas, the synchronization marks having a specified pattern which is different from any pattern of data in the recording medium;
• and
• mark rows respectively provided next to the synchronization marks along each of the first and the second tracks at a specified angular interval which is shorter than the rotation angular interval of the clock marks, and also has a relationship indicated by a ratio of integers with the rotation angular interval of the clock marks.