| 摘要 |
PURPOSE:To enable effective management by recording additional data in the subsequent part of having read data when there is an invalid data part in the final recording information unit of a file at the time of recording additional data and invalidating a final recording unit area in a file whose name is the same and whose flag is more than a maximum value so as to control it at the time of reproduction. CONSTITUTION:All final recording tracks in the file to be added are checked to be effective data or not. When a file capacity in a directory 301 for managing a file A(1) is not the integral multiple of the capacity of one track, invalid data comes to exist. In such a case, effective data 306 of the file A(1) to be added is read on a buffer memory 400 as data 401, and data 402 to be added is added in the subsequent part of it. At the time of reproduction, the file whose name is the same, whose flag is different and whose flag is more than the maximum value is managed with the final recording unit area as an invalid recording unit area. Thus, effective file management is enabled. |
