Boots – shoes – and leggings
Patent
1994-06-07
1996-12-10
Coleman, Eric
Boots, shoes, and leggings
36424341, 36424344, 364260, 364DiG1, G06F 1208
Patent
active
055840124
ABSTRACT:
A cache control method and a rotary storage device are capable at a low cost, of improving the hit rate and minimizing the processing time in the event of a miss hit. The rotary storage devices includes a plurality of disk units, an upper-level interface circuit, a cache controller, a cache memory, and a control processor. In each disk unit, the storage area of each disk is subdivided into an ordinary user data area and a secondary cache data storage area including a group of consecutive cylinders. Data which has overflowed from the cache memory is sequentially written in the secondary cache data storage area so as to be later transferred therefrom to areas of the user data area according to addresses inherent thereto when traffic of upper-level input/output processing is relatively low. In the case of a miss hit of the cache memory during a data read operation, access operations are performed first to the secondary cache data storage area and then to the user data area.
REFERENCES:
patent: 4636946 (1987-01-01), Hartung
patent: 4843541 (1989-06-01), Bean
patent: 5353410 (1994-10-01), Macon
patent: 5410666 (1995-04-01), Nakano
Haruna Toshiyuki
Hirose Tsuneo
Kobashi Tetsuzo
Kojima Akira
Sato Masahiko
Coleman Eric
Hitachi , Ltd.
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