Recording/playback apparatus capable of carrying out linking on optical disk, and optical disk recorded with linked data

An optical disk recording/playback apparatus for recording and playing back information signal using an optical disk capable of additionally recording new information signal subsequent to existing recording area in which information signal is recorded, said optical disk having successive ECC blocks thereon each composed of a plurality of sectors each including an ID area in which an ID number is recorded, a user data area in which a user data is recorded, and a CPM area, located after the ID area and before the user data area, in which copy protect information is recorded, said optical disk recording/playback apparatus comprising:

• a recording means for recording an information signal on said optical disk;
• a supplying means for supplying said recording means with first and second user data to be recorded on the user data area of said optical disk as said information signal;
• and
• a first generating means for generating a first data different from the user data and supplying said recording means with the first data, wherein
• said recording means, after terminating a recording of the first user data, records the first data generated by said generating means in the user data area excluding an area thereof in which an end of the first user data is recorded and in an area from a head to midway of the CPM area in a next sector located after the user data area in which the end of the first user data is recorded, and said recording means, upon recording the second user data, records the first data generated by said generating means in the CPM area excluding an area thereof in which the first data has been already recorded, and records the second user data from a next user data area located after the CPM area, thereby to use the CPM area as a linking area.