An optical disk having an attribute wihich designates whether a recording area permits rewriting or not

An optical disk drive device for use in combination with an optical disk comprising a recording region, physical tracks in said recording region each corresponding to one revolution, said recording region being divided into a plurality of zones by one or more circular boundary lines centered on the center of the disk, each zone comprising a plurality of tracks adjacent to each other, wherein an integer number of sectors are provided in each physical track, the angular recording density is higher in the more outward zones such that the linear recording density is substantially constant throughout the recording region, and logical tracks are formed of a predetermined number of sectors, independent of the physical tracks, said optical disk drive device determining the logical track address and the sector address responsive to a linear logical address by determining the integral quotient and the remainder by dividing the linear logical by the number of the sectors per logical track.

An optical disk drive device for use in combination with an optical disk comprising a recording region, physical tracks in said recording region each corresponding to one revolution, said recording region being divided into a plurality of zones by one or more circular boundary lines centered on the center of the disk, each zone comprising a plurality of tracks adjacent to each other, wherein an integer number of sectors are provided in each physical track, the angular recording density is higher in the more outward zones such that the linear recording density is substantially constant throughout the recording region, and logical tracks are formed of a predetermined number of sectors, independent of the physical tracks, wherein a difference obtained by subtracting the number of the logical tracks corresponding to each zone from the number of the logical tracks corresponding another zone adjacent to and radially outside of said each zone is of a constant value, said optical disk drive device determining the zone containing the target sector on the basis of a product of said constant value and the number of the zones.

An optical disk drive device for use in combination with an optical disk comprising a recording region, physical tracks in said recording region each corresponding to one revolution, said recording region being divided into a plurality of zones by one or more circular boundary lines centered on the center of the disk, each zone comprising a plurality of tracks adjacent to each other, wherein an integer number of sectors are provided in each physical track, the angular recording density is higher in the more outward zones such that the linear recording density is substantially constant throughout the recording region, and logical tracks are formed of a predetermined number of sectors, independent of the physical tracks, said optical disk further comprising a table for recording attributes of the respective zones, said attributes indicating whether each zone is designated as a rewritable area, a write-once area or a read-only area, said table being formed in at least one track or in at least one sector, said optical disk device comprising a means for altering the attributes of the respective zones.

An optical disk drive device for use in combination with an optical disk comprising a recording region, physical tracks in said recording region each corresponding to one revolution, said recording region being divided into a plurality of zones by one or more circular boundary lines centered on the center of the disk, each zone comprising a plurality of tracks adjacent to each other, wherein an integer number of sectors are provided in each physical track, the angular recording density is higher in the more outward zones such that the linear recording density is substantially constant throughout the recording region, and logical tracks are formed of a predetermined number of sectors, independent of the physical tracks, said optical disk comprising a first part of the recording region designated as a rewritable area and a second part of the recording region designated as a write-once area, said optical disk device comprising a means for permitting access of only said rewritable area to a host device, and means for altering an attribute of said second part from the write-once area to the rewritable area and copying the data in said first part to said second part while said host device is not accessing the optical disk.