Patent ID: 8139454
Filing Date: 2012-03-20
Classification: G11B

Abstract:
1. A recording and reproducing apparatus for use with a medium comprising a User Data Area, a disk management information recording area, a laser power adjusting area, a Spare Area, and a Physical Area Control (PAC) area as a physical access control data recording area to record physical access control data, the apparatus comprising: management information recording unit for recording management information of a disk in the disk management information recording area; laser power adjusting unit for adjusting laser power in the laser power adjusting area; spare processing data recording unit for recording spare data in the Spare Area; PAC control unit for recording, in the PAC area, a PAC cluster including physical access control data; and other area use notifying unit for sending a notification to the PAC control unit when each of the areas is inherently allocated for recording operation for each of the units, the notification notifying the PAC control unit to emit laser at a recording emission level to an area other than the areas inherently allocated to the respective units, wherein the PAC control unit records, at reception of the notification from the other area use notifying unit, the PAC cluster in the PAC area, the PAC cluster including information indicating a purpose of use of the area other than the areas inherently allocated to the respective units.