Optical record medium including data record region and directory

Details Optical record medium including data record region and directory Optical record medium including data record region and directory

1992-09-25

1994-09-20

Young, W. R.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 54, 235454, G11B 700

Patent

active

053495772

ABSTRACT:
An optical card having a file data record region in which a number of file data are recorded and a directory record region in which a number of directories for managing the file data are recorded. The directory includes a file name specific to file data and a track address denoting a track on which the relevant file data has been recorded. In order to change a file name, there is prepared a file name changing directory in which an old file name and a new file name are set. When the file name changing directory is processed, a directory having a file name corresponding to the old file name is retrieved and the file name of the thus retrieved directory is changed into the new file name. In this manner, the file name can be changed easily and effectively. Further, when file data is to be erased, there is prepared a file name changing directory having the file name of the relevant file data as the old file name and a special file name as the new file name. When this file name changing directory is processed, a directory having a file name corresponding to the relevant old file name is erased. In this manner the relevant file data can be erased logically.

REFERENCES:
patent: 5091635 (1992-02-01), Akatsuka et al.
patent: 5107481 (1992-04-01), Miki et al.
patent: 5111033 (1992-05-01), Fujita et al.
patent: 5111444 (1992-05-01), Fukushima et al.

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