Structured data storage method and medium

Details Structured data storage method and medium Structured data storage method and medium

1990-08-20

1991-08-27

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369 32, 36523001, 364900, G06F 1500, G11C 1300

Patent

active

050439677

ABSTRACT:
A WORM data storage medium includes primary and secondary data storage areas in which data and pointers to allocated but unwritten update areas are written. Original and updated data is written in a write sequence or chain of primary data areas separated by branched secondary data storage areas. The most recent updated data is found in a two level search of primary and then secondary data storage areas in order to save time by searching only those secondary areas where the most recent update exist.

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patent: 4792936 (1988-12-01), Picard
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patent: 4827462 (1989-05-01), Flannagan et al.
IBM Technical Disclosure Bulletin; D. D. Grossman, Updating Non-Erasable Storage, Jun. 1981, 775-776, vol. 24, No. 1B.
IBM Technical Disclosure Bulletin; W. J. Flannagan et al., Incremental Directory Indexes in a Write-Once Recording Environment, Mar. 1988, 344-350, vol. 30, No. 10

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