Method 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
ApplicationNo. 06/800062 filed on 11/20/1985
US Classes:360/72.1, Locating specific areas360/49Address coding
ExaminersPrimary: Canney, Vincent P.
Attorney, Agent or Firm
International 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.