Device and method for controlling write-back of data in a cache

Details Device and method for controlling write-back of data in a cache Device and method for controlling write-back of data in a cache

1998-04-20

2000-11-07

Bragdon, Reginald G.

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

711113, 711143, G06F 1208

Patent

active

061450588

ABSTRACT:
A control mechanism of a disk controller measures read and write hit rates for each data item in the cache memory. The intended storage location on a disk of each data item in the cache is compared to the current head position of a recording/reproduction head on the disk and the distance therebetween is calculated. A selector selects for write-back data from among the data items stored in the cache in accordance with the read hit rate, write hit rate and the calculated distance. The selector also selects an item for write back based on a longest predicted data transfer time.

REFERENCES:
patent: 5519831 (1996-05-01), Holzhammer
patent: 5636355 (1997-06-01), Ramakrishnan et al.

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