| abstract |
(57) [Abstract] [Purpose] To provide a rewritable optical recording medium capable of leaving recorded past data management information in the medium and managing the number of times of data rewriting. A rewritable optical recording medium including a recording medium information management area, a user information management area, and a user area in a format. The user information management area has a number of user information management blocks equal to or more than the set number of times of rewriting of the optical recording medium, The set number of times of rewriting is recorded in advance in the recording medium information management area. The rewritten user management information is stored in each individual management block. |