Patent ID: 7974166

Claim:
An information recording apparatus for recording user data onto an information recording medium, in accordance with a recording method in which the user data can be further written once after the user data is once recorded, said information recording apparatus comprising: a recording zone reserving device for reserving a recording zone on the information recording medium, the recording zone being a continuous area for writing once a user data group, which is a group of the user data; a user data recording device for recording the user data included in the user data group, into the recording zone reserved by said recording zone reserving device; and a read error data recording device for recording read error data onto the information recording medium, the read error data causing a read error when information is read from the information recording medium by another apparatus, wherein said read error data recording device comprises a recording zone closing device for performing padding by recording the read error data as padding data into a remaining area, which exists at a tail of the recording zone in which the recording of the user data by said user data recording device is finished, to thereby close the recording zone, and said recording zone reserving device reserves the recording zone with a size obtained by totalizing a size of the user data and a size of the read error data.