International Business Machines Corporation

Kathryn Eileen Eldred

Kirby Grant Dahman

Wayne Erwin Rhoten

Jon Arthur Lynds

Gavin Stuart Johnson

Ralph Thomas Beeston

Joel Kenneth Lyman

Christopher Grunow

Erika Dawson

James Mitchell Ratliff

Lyn Lequam Ashton

Anthony Steve Pearson

Michael Ray Noel

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.

System for fast tape file positioning

Storage management system, apparatus, and method for supporting a multiplicity of logical block identification

A method to record information on a data storage medium using buffered tape marks. A data storage device comprising a computer useable medium having computer readable program code disposed therein for implementing Applicants' method to record information on a data storage medium using buffered tape marks. A data storage and retrieval system comprising a computer useable medium having computer readable program code disposed therein for implementing Applicants' method to record information on a data storage medium using buffered tape marks. Computer program products embodied as program code stored in one or more memory devices, such as a magnetic disk, a magnetic tape, or other non-volatile memory device disposed in a host computer, a data storage device, and/or a library controller.

Data management system, apparatus, and method to use buffered file marks

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Tucson, AZ, United States of America

Kathryn Eileen Eldred