Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1987-04-13
1988-10-04
McElheny, Jr., Donald
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
369 32, 369 59, 369100, 369111, 360 48, 360 722, 364200, G11B 7013, G06F 1300
Patent
active
047759690
ABSTRACT:
An Optical Disk Storage system and method for the storage of magnetic tape records including an optical disk and a system for writing variable-length records to the disk with a plurality of embedded directories in close proximity to a plurality of records associated therewith. A high-level directory is constructed providing a list of addresses for the embedded directories. The embedded directories comprise a fixed maximum number of entries each indicating the length of a corresponding record. In a read operation, the high-level directory is accessed first to provide addresses for the embedded directories, with reference to positional information permanently written to the disk. Bytes of data are then counted in accordance with the stored record length information to access a record of interest. In this way, varying-length records can be efficiently stored on an optical disk divided into fixed-length data blocks.
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Aquidneck Systems International, Inc.
McElheny Jr. Donald
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