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

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

G - Physics

11

B

354/120, 352/10.

G11B 27/28 (2006.01) G06F 3/06 (2006.01) G06F 17/30 (2006.01) G11B 7/007 (2006.01) G11B 7/013 (2006.01) G11B 20/12 (2006.01) G11B 20/18 (2006.01) G11B 27/32 (2006.01)

Patent

CA 1281424

ABSTRACT OF THE DISCLOSURE An updatable and expandable directory structure and resul- tant 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. TU985007

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