Dynamic control of outstanding hard disk read requests for seque

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395474, 39520008, 364DIG1, 364DIG2, 3642281, 3642481, 3642362, 364251, 364252, G06F 1200

Patent

active

055220541

ABSTRACT:
Computer system which varies the number of read requests outstanding to hard disk drives based on the mix of sequential and random requests. If a sequential request is received, a limited number of requests are allowed to be outstanding. If the requests are random, a growing number of read requests can be outstanding as the random requests continue, until a maximum number of write requests are allowed to be outstanding.

REFERENCES:
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patent: 4831622 (1989-05-01), Porter et al.
patent: 4937788 (1990-06-01), Harada
patent: 5133060 (1992-07-01), Weber et al.
patent: 5235692 (1993-08-01), Ayres et al.
patent: 5325509 (1994-06-01), Lautzenheiser
patent: 5392445 (1995-02-01), Takamoto et al.
PC User (ISA SCSI host adaptors), n207, p. 96(11) Mar. 24, 1993.

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