Optical recording medium recording and reproducing device

Details Optical recording medium recording and reproducing device Optical recording medium recording and reproducing device

1989-04-19

1991-09-10

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 58, G11B 2736

Patent

active

050480049

ABSTRACT:
A recording and reproducing device providing control data recording area on erasable type optical recording medium wherein control data are recorded thereof, characterized in that there is provided a control data recording area forming device for forming control data recording areas having more than two control recording blocks which in turn have more than one recording unit. The control data can be recorded independently. A control data updating device records new control data in the control data recording blocks which were the ones not previously being updated with control data, thereby allowing this device to minimize damage caused by electrical power failure.

REFERENCES:
patent: 4799208 (1989-01-01), Satoh et al.
patent: 4949326 (1990-08-01), Takagi et al.

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