Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2006-03-28
2006-03-28
Nguyen, Hiep T. (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C707S793000
Reexamination Certificate
active
07020742
ABSTRACT:
The present invention provides fast read performance for accessing a file from a multiplicity of files when its corresponding Block ID is unavailable, by furnishing new file-positioning commands, allowing access to data based on File Number, at the same fast locate speed as with Block Ids, thereby expanding the range of applications that can use certain tape drive systems effectively. The present invention includes both a device architecture for supporting the file oriented positioning and the appending, as well as a software system that can permit easy application access to the device facilities and system components which permit the advantages to accrue without any software application or operator changes, including a robust architecture for navigating residual data, e.g., for data recovery. The present invention comprises several device command innovations, a relative positioning command, an absolute positioning command, and other commands, e.g., for sensing current position.
REFERENCES:
patent: 4685152 (1987-08-01), Heare
patent: 5897661 (1999-04-01), Baranovsky et al.
patent: 5996055 (1999-11-01), Woodman
patent: 2003/0014585 (2003-01-01), Ji
Beeston Ralph Thomas
Dahman Kirby Grant
Eldred Kathryn Eileen
Grunow Christopher Paul
Lyman Joel Kenneth
International Business Machines - Corporation
Nguyen Hiep T.
Regelman Dale F.
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