Disk drive with cache having entry table prioritized to reduce s

Details Disk drive with cache having entry table prioritized to reduce s Disk drive with cache having entry table prioritized to reduce s

1997-06-25

1999-06-22

Bragdon, Reginald G.

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

711137, 711136, 711158, G06F 1208

Patent

active

059152605

ABSTRACT:
A method is practiced in a disk drive in which a cache is divided into segments each having a segment priority. The method provides for managing the segment priority. The drive has an intelligent interface for communicating with a host, and a magnetic disk. The cache employs a cache control structure including a cache array with a cache array entry. There is a cache array entry for each one of the number of segments. The method comprises the steps of: maintaining the cache array entry wherein each cache array entry classifies a segment by a cache access type, wherein the cache access type is selected from a plurality of access types including sequential and random; and determining whether to change the scan priority of each segment based on the cache access type.

REFERENCES:
patent: 4509119 (1985-04-01), Gumaer et al.
patent: 4882642 (1989-11-01), Tayler et al.
patent: 5432919 (1995-07-01), Falcone et al.
patent: 5537568 (1996-07-01), Yanai et al.

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