MEDIUM REKAMAN, METODE REKAMAN ATAU REPRODUKSI DAN PERALATAN REKAMAN ATAU REPRODUKSI

摘要

A disc-shaped recording medium for magnetically recording informationsignals, in which logical block addresses are associated with the recording tracks onthe disc in such a sequence in which the logical block addresses proceed in arecordable information area towards the outer rim side, with a first recording track ata mid portion between the innermost recording track and the outermost recording trackon the lower disc surface as a logical starting point, until reaching a second recordingtrack, the logical block addresses then proceeding from a third recording track at a midportion between the innermost recording track and the outermost recording track onthe upper disc surface towards the inner rim side as far as a fourth recording track, thelogical block addresses then proceeding towards the outer rim side from the nextrecording track of the second recording track on the lower disc surface lying towardsthe outer rim side, as far as the outermost recording track on the lower disc surface,the logical block addresses then proceeding from the outermost recording track on theupper disc surface towards the inner rim, to skip the third and fourth recording tracks,until reaching the innermost recording track on the upper disc surface, the logicalblock addresses then proceeding from the innermost rim on the lower disc surfacetowards the outer rim side as far as the recording track directly ahead of the firstrecording track. This structure gives a disc-shaped recording medium having highreliability and high efficiency.