Modular data storage directories for large-capacity data storage

Details Modular data storage directories for large-capacity data storage Modular data storage directories for large-capacity data storage

1987-03-26

1989-05-02

Canney, Vincent P.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

G11B 1722

Patent

active

048274623

ABSTRACT:
An updatable and expandable directory structure and resultant access procedures emulating a write-once or indelible record medium to a rewriteable record medium as to accessing characteristics. The directory is indexed; one directory header for a first set of files indexes another set of files. Sector clusters or data extents are managed such that random recording from any file proceeds independently of write-once characteristics. The directory is stored on the medium as data is recorded. Each directory entry contains an archival history of recording of a related data file in the medium. Both logical and physical addressing is employable.

REFERENCES:
patent: 4408728 (1984-08-01), Wong
patent: 4420807 (1983-12-01), Nolta et al.
patent: 4575827 (1986-03-01), Kulakowski
patent: 4611272 (1986-09-01), Lomet
IEEE Transactions on Magnetics "Laser Mass Memory System", E. E. Gray, Sep. 1972, pp. 416-420, FIG. 12.
IBM Personal Computer, Computer Language Series Disk Operating System (DOS 2.1), 1983 Part Number 1502343.

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