The present invention is directed to a data recordable optical disc (2), wherein buffer areas for random access (Data Run-in DRi, Data Run-out DRo) for random access are respectively disposed before and after respective blocks (BLK, BLK1, BLK2), whereby when recording of new block is started, the block...http://www.google.com/patents/US7626909?utm_source=gb-gplus-sharePatent US7626909 - Optical recording medium, information processing device using the recording medium, and data recording method
