G - Physics – 11 – B
Patent
G - Physics
11
B
G11B 23/18 (2006.01) G11B 5/76 (2006.01) G11B 20/12 (2006.01) G11B 20/18 (2006.01) G11B 25/04 (2006.01) G11B 27/32 (2006.01)
Patent
CA 2262191
A disc-shaped recording medium for magnetically recording information signals, in which logical block addresses are associated with the recording tracks on the disc in such a sequence in which the logical block addresses proceed in a recordable information area towards the outer rim side, with a first recording track at a mid portion between the innermost recording track and the outermost recording track on the lower disc surface as a logical starting point, until reaching a second recording track, the logical block addresses then proceeding from a third recording track at a mid portion between the innermost recording track and the outermost recording track on the upper disc surface towards the inner rim side as far as a fourth recording track, the logical block addresses then proceeding towards the outer rim side from the next recording track of the second recording track on the lower disc surface lying towards the 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 the upper 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 logical block addresses then proceeding from the innermost rim on the lower disc surface towards the outer rim side as far as the recording track directly ahead of the first recording track. This structure gives a disc-shaped recording medium having high reliability and high efficiency.
Gowling Lafleur Henderson Llp
Sony Corporation
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