Arbitration method and system for redundant controllers,...

Details Arbitration method and system for redundant controllers,... Arbitration method and system for redundant controllers,...

2007-10-30

2007-10-30

Wilson, Yolanda L (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S012000, C714S013000, C714S004110

Reexamination Certificate

active

10820177

ABSTRACT:
An arbitration mechanism is provided for arbitrating between redundant controllers having outputs electrically connected together and provided as input to at least one device under control. The arbitration mechanism includes logic for automatically determining which controller of the redundant controllers is active controller, and a hardware output interlock for the redundant controllers to ensure that output controlled by only the active controller is enabled as input to the at least one device. The arbitration mechanism also includes logic for monitoring the active controller for failure, and upon detection of failure, for automatically switching active control to another controller of the redundant controllers transparent to the at least one device.

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