System for controlling data flow between plurality of host inter

Details System for controlling data flow between plurality of host inter System for controlling data flow between plurality of host inter

1993-11-08

1997-02-11

Lee, Thomas C.

395873, 395427, 395886, G06F 1300, G06F 1336

Patent

active

056030622

ABSTRACT:
An external storage system is connected to a host system. A controller unit interposed between disk drives and the host system has a large capacity buffer memory with a battery providing non-volatile storage, a plurality of host interfaces and a plurality of drive interfaces. All the accesses made to the disk drives from the host system are realized via the buffer memory which allows a high-speed access. Read/write processing performed for the buffer memory by the host system is executed asynchronously with read/write processing performed between the buffer memory and the disk drives. The drive interface and the host interface area released during a period in which operation of the disk drive is waited for and recoupled upon data transfer.

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patent: 4591973 (1986-05-01), Ferris, III et al.
patent: 5029124 (1991-07-01), Leahy et al.
patent: 5097483 (1992-03-01), Bechtolsheim
patent: 5280589 (1994-01-01), Nakamura
patent: 5388217 (1995-02-01), Benzschawel et al.

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