Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1994-12-05
1996-10-15
Epps, Georgia Y.
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
369 47, 369 54, 369 59, G11B 700
Patent
active
055661530
ABSTRACT:
An optical card information recording and reproducing device is composed of a controller for controlling data transfer to and from an external unit and the overall operation of the device, a memory for temporarily holding data to be recorded and data to be reproduced, a read/write unit for reading and writing data from and on an optical card, a directory size discrimination unit for discriminating a directory size, a directory size switch unit for switching directory sizes to be used for recording, two record controllers for controlling the read/write unit in accordance with each directory size, and a partition switch unit for controlling the directory size discrimination unit and the directory size switch unit in response to partition information and the like from the controller. The partition switch unit identifies the arrangement of directory information by the partition information from the controller and a sector type and controls the directory size discrimination unit and the directory size switch unit based on the arrangement of the directory information. Further, the directory size discrimination unit, the directory size switch unit and the record controllers constitute a directory information creation device for discriminating the directory size based on the arrangement of the directory information and creating directory information in accordance with the directory size.
REFERENCES:
patent: 5414689 (1995-05-01), Maeda et al.
Edun Muhammad N.
Epps Georgia Y.
Olympus Optical Co,. Ltd.
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