Method for mapping around defective sectors in a disc drive
Patent 4746998 Issued on May 24, 1988. Estimated Expiration Date: 
November 20, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 20, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod and apparatus for recording data without recording on defective areas of a data recording medium Apparatus for detecting faulty sectors and for allocating replacement sectors in a magnetic disc memory Memory system Patent #: 4558446 InventorsApplicationNo. 06/800062 filed on 11/20/1985US Classes:360/72.1, Locating specific areas360/49Address codingExaminersPrimary: Canney, Vincent P.Attorney, Agent or FirmInternational ClassesG11B 20/18 (20060101)G06F 3/06 (20060101) AbstractThe defect list, as supplied by the manufacturer, is stored on the outer tracks of the disc. It is merged with the user-supplied media defect list during formatting and used to flag defective sectors. During initialization the merged defect list is loaded into a section of dynamic memory so that it is accessible during seeking of a particular address. | |
