Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Patent
1997-10-15
2000-03-07
Beausoliel, Jr., Robert W.
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
714 2, 714 3, 714 10, 714 12, 714 13, G06F 1116
Patent
active
06035416&
ABSTRACT:
Controller triple modular redundancy is substantially achieved and reliability improved in a system having duplicate controllers that serve peripheral units. Both controllers detect suspected faults in itself and in the other controller. A peripheral unit that suspects a faulty active controller requests a switch of the active controller. A voting circuit processes votes from the controllers and the active controller switch signal from the peripheral units to select the active controller. The signaling paths between the controllers used to convey votes and active controller information are duplicated. The signals on these signaling paths convey information by using oscillating signals of different frequencies.
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Abdelnour George Michel
Bond Arthur Latimer
Downes Robert W.
Potter, Jr. Kenneth H.
Yu Frederick K.
Beausoliel, Jr. Robert W.
Hamdan Wasseem H.
Herndon Jerry W.
International Business Machines Corp.
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