The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 18, 2003
Filed:
Mar. 10, 1999
Jeffrey Joseph Dobbek, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A direct access storage device (DASD) performs defect mapping and translates logical block address references to physical block addresses with a virtual track (VT) table and a virtual sector (VS) table, and also uses a prototype table (VS ) that contains index locations for all virtual tracks that contain spares and identifies sectors located on the track, and a reassign table (VS ) that contains exceptions from the prototype table due to reassignment of a spare sector. The VS table contains index locations that identify a group of sectors located on the track corresponding to the index location, but does not include spares. The VT table includes columns that point into the VS and VS tables. The overall size of the defect mapping tables is reduced by removing the spare sectors from the VS table, thereby more efficiently utilizing storage system resources.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile