Patent ID: 8121005

Claim:
An apparatus to record data and/or reproduce data from and/or on a write-once disc having a plurality of update areas used in a predetermined order and at least one access information area (AIA), the plurality of update areas comprising an update area arranged in a lead-in area of the write-once disc and at least one update area arranged in a data area of the write-once disc, the apparatus comprising: a write/read unit configured to write or read information on or from the write-once disc; and a controller configured to: control the write/read unit to record a predetermined kind of updated information in one of the plurality of update areas and record access information (AI) in the access information area (AIA) in recording block units, the AI comprising location information of the plurality of update areas and indicating a final update area in which a final predetermined kind of updated information is recorded among the plurality of update areas, using a number of recording blocks in which the access information (AI) is recorded; and control the write/read unit to record the access information (AI) in response to the one update area in which finally updated information is recorded being changed, wherein in case the access information has not been recorded in the access information area, the controller determines that the final predetermined kind of updated information has been recorded in the update area arranged in the lead-in area of the write-once disc.