Replicated controller and fault recovery method thereof

Details Replicated controller and fault recovery method thereof Replicated controller and fault recovery method thereof

1998-03-17

2000-03-14

Beausoliel, Jr., Robert W.

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

707202, G06F 1100

Patent

active

060386835

ABSTRACT:
A replicated controller and a fault recovery method therefor which can restore a faulty system to a normal state without interrupting operation of an equipment, even in an equipment controller performing processing with short operating periods.
In a fault recovery method for a replicated controller, control data is divided into a plurality of blocks on the basis of dependency of the blocks, and a plurality of blocks are transferred in a sequential order of superiority of the dependency from the normally operating system to the faulty system in a period over a plurality of operating periods. BY this, even in an equipment controller performing processing at a short operating period, the system, in which failure is caused, can be restored into normal state without interrupting operation of the equipment.

REFERENCES:
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patent: 4972473 (1990-11-01), Ejiri et al.
patent: 5572678 (1996-11-01), Homma et al.
patent: 5598529 (1997-01-01), Garay et al.
patent: 5751955 (1998-05-01), Sonnier et al.
patent: 5790776 (1998-08-01), Sonnier et al.
patent: 5913219 (1999-06-01), Baek et al.

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