Methods and apparatus for resetting peripheral devices addressab

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364900, G06F 1100

Patent

active

044032889

ABSTRACT:
Direct access storage devices (DASD) are connected to a host via a cache. Each device can be independently addressed by any one of a plurality of addresses, also termed logical devices and exposures. Since operations between DASD and cache are combined for all of the independent logical devices, resetting operations related to one independent logical device can inadvertently interfere with operations of another independent logical device. To maintain data integrity, a programmed control accommodates logical device independence by using queues and control blocks relating to the DASD and logical devices, respectively.

REFERENCES:
patent: 4104718 (1978-08-01), Poublan et al.
patent: 4205374 (1980-05-01), Bardsley et al.

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