Electrical computers and digital data processing systems: input/ – Input/output data processing – Peripheral configuration
Reexamination Certificate
2008-05-13
2008-05-13
Park, Ilwoo (Department: 2182)
Electrical computers and digital data processing systems: input/
Input/output data processing
Peripheral configuration
C710S008000, C710S074000, C714S006130, C711S112000
Reexamination Certificate
active
07373433
ABSTRACT:
A method is disclosed for failover protection in an information storage and retrieval system comprising two clusters, two device adapters, and a plurality of data storage devices. The method provides a first device driver for a first device adapter and a second device driver for a second device adapter, and disposes those device drivers in both clusters. The method then places in operation the first device driver disposed in a first cluster, places in operation the second device driver disposed in a second cluster, and places in a standby mode the first device driver disposed in the second cluster. The method detects a failure of the first cluster, followed by a failure of the second device adapter. The method then makes operational the first device driver disposed in the second cluster, and continues to access information stored in the plurality of data storage devices using the first device adapter, and the first device driver disposed in the second cluster.
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International Business Machines - Corporation
Park Ilwoo
Quarles & Brady LLP
Regelman Dale F
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