Disc cache subsystem having plural-level cache memories

Details Disc cache subsystem having plural-level cache memories Disc cache subsystem having plural-level cache memories

1991-09-04

1994-12-06

Eng, David Y.

Boots, shoes, and leggings

395425, 395275, 3642434, 3649642, G06F 1200, G06F 1300

Patent

active

053718550

ABSTRACT:
In a data processing system communicating with disc drives via a disk channel, a disc cache subsystem coupled between the outboard side of the channel and the disc drives. The disc cache subsystem includes a plural-level cache memory comprised of a first memory and a second memory, wherein the first memory serves as input/output storage for the second memory. Provision is also made for controlling which of a plurality of disc drives is to be subject to caching by controlling which drives are to be bypassed.

REFERENCES:
patent: 4020466 (1977-04-01), Cordi et al.
patent: 4038642 (1977-07-01), Boulenecht
patent: 4075686 (1978-02-01), Calle et al.
patent: 4399503 (1983-08-01), Hawley

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