Patent ID: 6317407
Filing Date: 2001-11-13
Classification: G11B

Abstract:
An optical disk comprising a read-only area in which a plurality of read-only tracks are formed and a rewritable area in which a plurality of rewritable tracks are formed,wherein each of the plurality of read-only tracks is divided into a plurality of first sectors,a signal is prerecorded in at least one of the plurality of first sectors under a predetermined reproduction format,each of the plurality of rewritable tracks is divided into a plurality of second sectors,a signal is recordable in at least one of the plurality of second sectors under a predetermined recording format which includes the predetermined reproduction format as a part thereof and further includes another part specific to the predetermined recording format, andthe read-only area is located on an inner portion of the optical disk, while the rewritable area is located on an outer portion of the optical disk.