Write once read many optical disc storage system having director

Details Write once read many optical disc storage system having director Write once read many optical disc storage system having director

1988-10-28

1991-08-13

Williams, Jr., Archie E.

Boots, shoes, and leggings

3642325, 3642362, 3642364, 3642446, 3642481, 3642494, 3642564, 3642602, 3642628, 3642831, 369111, G06F 934, G06F 1210, G11B 728, G11B 1114

Patent

active

050401106

ABSTRACT:
An information management system for writable optical discs, includes a disc (7) on which data (7a) and management information (7b) are recorded; an operating system (1) in which data in a read only optical disc can be managed by means of files, the operating system (1) having a read instruction (2) and a write instruction (3); read control portion (5) for changing the read instruction directed to the read only optical disc into a read address instruction directed to the disc (7), the read control portion (5) having modifying and loading portion (5b) for changing the management information (7b) into mutual information having a format of the read only optical disc; internal storage (5c) for storing the mutual information; and access changing portion (5d) responsive to the read instruction (2) for switching an access target such that the access target is the disc (7) when the read instruction (2) is directed to the data recorded on the disc ( 7), and that the access target is the internal storage (5c) when the read instruction (2) is directed to the management information (7b) recorded on the disc (7); and write control portion (6) for renewing the address modifying information in the read control portion (5) in response to the write instruction (3) when new data is written in the disc (7).

REFERENCES:
patent: 4545044 (1985-10-01), Satoh et al.
patent: 4672599 (1987-06-01), Geyer et al.
patent: 4682305 (1987-07-01), Ishikawa
patent: 4945525 (1990-07-01), Yamamoto et al.
"Information Processing--Volume and File Structure of CDROM for Information Interchange", Draft International Standard ISO/DIS 9660 International Organization for Standardization, 1987.

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