Information processing system having function to detect fault in

Details Information processing system having function to detect fault in Information processing system having function to detect fault in

1996-05-23

1998-04-21

Beausoliel, Jr., Robert W.

G06F 1300

Patent

active

057428514

ABSTRACT:
An information processing system having such a redundancy constitution as including a plurality of processors and an operation switching control unit for switching operations of operational processors and standby operations, in which each processor operating as the operational processor is provided with a fault detective data transmitting unit for transmitting a fault detective data to each processor operating as the standby processor through an external bus, while each processor operating as the standby processor is provided with a fault checking unit for checking whether a fault exists or not, in the external bus or in an interface, on the basis of the fault detective data, and the operation switching control unit fixes an operating state so as not to switch the operation between the operational and standby processors, even if detecting a fault in the processor operating as the operational processor, after a fault has been detected in the external bus or in the interface.

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