Patent ID: 8125879

Claim:
A recording medium; comprising: a data area including a plurality of segment regions specified by one or more access control information and a replacement region for replacing a defective region in the segment region; a first control data area storing the access control information, the access control information including: a predetermined rule in the access control information if the access control information is not identified by a recording/reproducing device, the predetermined rule indicating whether it is allowed for the recording/reproducing device to read/write data from/on the first control data area, a segment field for specifying the segment regions to which the access control information applies, a number of segments filed for indicating the number of the segment regions specified by the access control information, and an entire disc flag field for indicating that the access control information is applicable to the entire area of the recording medium; a second control data area storing defect control information for controlling the defective region, the defect control information including a defect list entry, the defect list entry including, a status field indicating a type of the defective region as one of a first type having a single defective cluster and a second type having a plurality of defective clusters, a defective cluster address field indicating a physical sector number of the defective region, and a replacement cluster address field indicating a physical sector number of the replacement region; and a third control data area storing a copy of the access control information, wherein the number of the segment regions is limited to a predetermined value, and the defect list entry defines the replacement region as a part of the segment region to the access control information.