Patent ID: 6243338
Filing Date: 2001-06-05
Classification: G11B

Abstract:
A recording apparatus for use with a disc-shaped record medium having a user data area and a management area, comprising:recording means for recording at least one bit map that represents whether or not each data unit for recording/reproducing has been recorded; andprocessing means for recording the bit map to the management area of the disc-shaped record medium, and referencing the bit map and adding a predetermined amount of data that contains at least one of servo information and position information to a non-recorded area in the vicinity of recorded data so as to allow a reproducing apparatus that reproduces data from a read-only disc-shaped medium and obtains at least one of the servo information and the position information from a reproduced signal to reproduce data from a rewritable disc-shaped record medium,wherein the management area includes a plurality of bit maps and an update counter, each of the bit maps has a value of an update counter that represents the number of update operations of the bit map, andthe processing means rewriting the plurality of bit maps successively and rewriting the value of the update counter of the bit map rewritten based on the number of update operations.