Method and apparatus for media defect management and media addressing
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United States of America Patent
Stats
-
Dec 14, 1993
Grant Date -
N/A
app pub date -
Apr 27, 1990
filing date -
Apr 27, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This 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.
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