Patent ID: 6336197
Filing Date: 2002-01-01
Classification: G11B

Abstract:
An information recording medium, comprising:a disk information area; and a data recording area including a user area and a spare area, the user area including a plurality of sectors, the spare area including at least one sector which is usable when at least one of the plurality of sectors included in the user area is a defective sector, wherein: the spare area is located radially inward from the user area, a physical sector number of a sector to which a logical sector number â€œ0â€  is assigned, among the plurality of sectors included in the user area and the spare area, is recorded in the disk information area, the data recording area is divided into a plurality of zones, and for each zone other than the zone to which the logical number â€œ0â€  is assigned, logical sector numbers are respectively assigned to the sectors in the zone so that a first sector among the sectors to which logical sector numbers can be assigned in the zone matches a first sector of an ECC block, logical sector numbers are respectively assigned to the sectors included in the user area in a decreasing order from the sector to which a last logical sector number is assigned, and any logical sector number is not assigned to the defective sector included in the user area.