Optical disk and optical disk apparatus

Details Optical disk and optical disk apparatus Optical disk and optical disk apparatus

1998-03-04

2000-01-04

Edun, Muhammad

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 47, 369 59, G11B 700

Patent

active

060117648

ABSTRACT:
An optical disk includes a user accessible area having a plurality of blocks and flag data recorded on the optical disk. The flag data indicates whether or not each of the blocks is in an erased state in which there is no recorded data. A flag area stores the flag data, and area data indicating that the optical disk has the flag area is recorded on the optical disk.

REFERENCES:
patent: 4916680 (1990-04-01), Oldham
patent: 4958314 (1990-09-01), Imai et al.
patent: 5023854 (1991-06-01), Satoh et al.
patent: 5132954 (1992-07-01), Kulakowski et al.
patent: 5247494 (1993-09-01), Ohno et al.
patent: 5270877 (1993-12-01), Fukushima et al.
patent: 5309425 (1994-05-01), Yamamuro et al.

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