| 摘要 |
<p>An optical disk type storage media that increases storage capacity and increases security control capability for stored program data is disclosed. The concerned optical disk type storage media has a first storage area, second storage area, and third storage area between the aforementioned first and second storage areas, all of which have different storage densities. Storage is performed with a constant line velocity for the aforementioned first storage area and second storage area, and storage is performed with a constant angle velocity for the third storage area. Also, the aforementioned second storage area is placed on the outermost periphery in the radial direction, and program data is stored in at least the outermost area of the aforementioned second storage area. <IMAGE></p> |
