Patent ID: 7136348

Claim:
An optical recording medium as a disc-shaped DVD-R or DVD-RW medium provided with a main information area capable of recording an information signal and a subsidiary information area for recording subsidiary information that is different from the information signal, which are divided in a plane direction of a substrate, wherein medium identification information for distinguishing the disc-shaped medium optically is recorded in the subsidiary information area, the medium identification information is present in the range between 22.77 mm and 23.45 mm from the center of the medium, a PCA area for trial writing for adjusting a power for recording the information signal in the main information area, and an RMA area for recording a history of control of the power for recording in the main information area are provide in the subsidiary information area, and the PCA area is present in the range between 21.9 mm and 22.3 mm from the center of the medium, and the RMA area is present in the range between 22.1 mm and 22.6 mm from the center of the medium.