Method and apparatus for media defect management and media addressing
December 14, 2010. 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 References 3771143 Disk format for secondary storage system Method for mapping around defective sectors in a disc drive Alternate storage areas in magnetooptical media Cylinder defect management system for data storage system Method and apparatus for encoding and mapping magnetic disk sector addresses Management of defect areas in recording media Method and apparatus for improved disk access Method of managing defective sectors in a disk-shaped information recording medium and an apparatus for performing the same Sector slip with address collision recovery for write once recording media InventorApplicationNo. 516456 filed on 04/27/1990US Classes:714/710, Replacement of memory spare location, portion, or segment360/48, Data in specific format360/72.1, Locating specific areas369/30.07Specified contents information modification processingExaminersPrimary: Baker, Stephen M.Attorney, Agent or FirmInternational ClassesG11B 020/12G11B 027/00 AbstractThis invention provides a defect management scheme for mass storage devices such as disk drives. The data tracks formed on the surface of the storage media are divided into a plurality of zones. Each zone is divided into a number of logical partitions, with each partition containing a fixed number of sectors. Each partition also includes at least one local spare sector at the end of the partition. Each zone, which may consist of one or more partitions, includes a number of overflow spare sectors at the end of the zone. If there is a defective sector in a partition, the local spare sector is used to replace the defective sector. If there are more defective sectors in a partition than there are local spare sectors, an overflow spare sector is used to replace the additional defective sectors. | |
