Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2005-08-09
2005-08-09
Padmanabhan, Mano (Department: 2188)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C714S005110, C714S044000
Reexamination Certificate
active
06928514
ABSTRACT:
A high availability storage system is provided in a server. The server includes a plurality of storage controllers. The storage controllers may be connected to storage enclosures that house the physical devices. If one controller fails, the second controller assumes command of the drive array handled by the failed controller with no interruption of server operation or loss of data. The controllers are connected to the physical drives via a channel or bus, such as a small computer systems interface bus. When two or more teaming controllers are active, the channel or bus may be split to increase throughput. A team driver is provided to direct and redirect requests to the appropriate controllers. The team drive may detect a failed controller, rejoin the bus, and assign control of all logical or physical drives to the remaining active controller. The team driver may also detect a new controller being added to the system, slit the bus, and divide the logical drives between the teaming controllers.
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Chatterjee Paresh
Maharana Parag Ranjan
Baker Paul
LSI Logic Corporation
Padmanabhan Mano
Yee & Associates
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