Redundant path control apparatus and redundant path control...

Details Redundant path control apparatus and redundant path control... Redundant path control apparatus and redundant path control...

2005-02-04

2008-11-18

Sorrell, Eron J (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output access regulation

C710S062000, C710S074000, C714S005110, C714S012000

Reexamination Certificate

active

07454533

ABSTRACT:
A host computer is connected to logical disks via controllers, and accesses the logical disks. When maintenance work is performed on a first controller, information indicating that the first controller is undergoing maintenance work is stored in the other controllers. When an access is made to a logical disk designating a path including the first controller, a redundancy driver of the host computer can discriminate the cause for an access failure based on the information stored in the other controllers even if the access fails.

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Meador, Wes E., Disk Array Systems, 1989, Maximum Strategy, Inc., San Jose, CA, pp. 143-146.

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