Patent ID: 7277371
Filing Date: 2007-10-02
Classification: G11B

Abstract:
1. A recording medium provided with a write-once recording area allowing data to be written therein only once and comprising: an ordinary recording/reproduction area which data is recorded into and reproduced from; an alternate area used for storing data in an alternate-address process for a defect existing in said ordinary recording/reproduction area and a data renewal; a first alternate-address management information area for recording alternate-address management information for managing said alternate-address process using said alternate area; and a second alternate-address management information area for recording said alternate-address management information as data that can be updated, wherein said alternate-address management information recorded in said second alternate-address management information area includes information of a first information format, which shows an alternate source address and an alternate destination address for every data unit, and information of a second information format, which shows an alternate source address and an alternate destination address for a collection of a plurality of physically continuous data units.