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:
May. 07, 2002
Filed:
Apr. 12, 1999
Mark R. Schibilla, Rochester, MN (US);
Western Digital Technologies, Inc., Lake Forest, CA (US);
Abstract
A method for recovering data from marginally defective data sites on a disk drive surface. If a user data site is determined to be marginally defective during a read operation, a read error recovery procedure is performed on the marginally defective data site. The read error recovery procedure begins by conditionally reassigning data from the marginally defective data site to a spare data site. Next, the data from the marginally defective data site is rewritten to the marginally defective data site. If the data rewrite operation is successful, the method ends. If the data rewrite operation fails, the conditionally reassigned data from the marginally defective data site is reassigned to the spare data site.