Selectively holding data in a buffer for defective backing store tracks
Data structure and search method for a data base management system
Self-archiving data recording
Key-accessed file organization
Method and apparatus for updating optical memory disc
File management system for use in an optical data storage system
Hierarchical file system to provide cataloging and retrieval of data
Pseudo-erasable and rewritable write-once optical disk memory system Patent #: 4953122
ApplicationNo. 517287 filed on 05/01/1990
US Classes:711/4, Dynamic-type storage device (e.g., disk, tape, drum)360/72.2, Responsive to recorded address360/78.14, By recorded servo reference or address signal369/30.04, Using recorded information indicative of storage medium contents369/47.54, By program or address signal707/200FILE OR DATABASE MAINTENANCE
ExaminersPrimary: Anderson, Lawrence E.
Attorney, Agent or Firm
International ClassG06F 012/00
AbstractAn 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 extends 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.