| US 7,453,780 B2 | ||
| Information recording medium, information recording/reproducing apparatus and information management method | ||
| Akihito Ogawa, Kawasaki (Japan); Hiroharu Satoh, Tokyo (Japan); and Chosaku Noda, Kawasaki (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Jul. 28, 2005, as Appl. No. 11/190,853. | ||
| Claims priority of application No. 2004-224486 (JP), filed on Jul. 30, 2004. | ||
| Prior Publication US 2006/0023596 A1, Feb. 02, 2006 | ||
| Int. Cl. G11B 7/00 (2006.01) | ||
| U.S. Cl. 369—53.21 [369/59.23] | 13 Claims |
| 10. An information management apparatus for a write-once type recordable optical disk comprising:
means for specifying a recorded portion of the write-once type recordable optical disk,
means for generating erasing data modulated by a modulation system of the same run length restriction as run length restriction
of a modulation system used for recording data, and
means for applying laser light based on the erasing data to the recorded portion and destroying recorded data.
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