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:
Apr. 03, 1990
Filed:
Sep. 21, 1987
Randolph H Graham, Fremont, CA (US);
Dennis W Hollenbeck, Santa Clara, CA (US);
Plus Development Corporation, Milpitas, CA (US);
Abstract
In a rotating disk drive for storing and retrieving data used by a host system computer, a narrow gap is provided within a data sector format for each concentric data track of the drive. This gap may be normally located at the end of the track, in a speed tolerance buffer region following the last sector. In the event a media defect is detected which otherwise falls within a NAR area for a particular sector, this gap may be shifted to the beginning of the data track, thereby shifting all of the sectors and their NAR areas backward by the width of the gap. The media defect otherwise falling into the NAR area of a particular sector then falls harmlessly into a data field of a preceding sector, and this preceding sector may then be read and mapped out of service by insertion of a spare sector within the physical track without any loss of user data storage capability.