Record medium with mechanism of secrecy protection

Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval

Reexamination Certificate

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Details

C369S047220, C369S053210, C369S059250, C369S030030

Reexamination Certificate

active

07006416

ABSTRACT:
A record medium preventing a first drive device from reading data therefrom while allowing a second drive device to read the data therefrom wherein data-read operation is performed according to volume management information stored in the record medium, including a predetermined area which stores record-medium-identification information therein, and a volume management information area which is different from the first predetermined area, and stores the volume management information therein.

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patent: 03057037 (1991-03-01), None

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