System zur Steuerung von Aufnahmebereichen auf einer beschreibbaren optischen Platte.

摘要

Areas in an optical disk (101) are classified into three kinds of areas: file areas, used areas, and erased areas. An erasing process to convert the used area into the erased area is executed asynchronously with a writing process, thereby preventing the decrease in data transfer speed due to the erasing process upon writing process. On the other hand, the file areas, used areas, and erased areas are managed on every continuous areas which are designated by the head position and the size or end position of the area. The file is preferentially assigned to the erased area or used area of a large size. With such a construction, the area management such as an integration of the erased area or the like can be performed and the file can be assigned to the continuous areas and the access speed can be improved.