Method and apparatus for providing redundancy in a data...

Details Method and apparatus for providing redundancy in a data... Method and apparatus for providing redundancy in a data...

2008-01-29

2008-01-29

Beausoliel, Robert (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S012000, C714S013000

Reexamination Certificate

active

09968905

ABSTRACT:
A method for operating a data processing system and a redundancy data processing unit for executing the method is disclosed. Two or more active data processing units are assigned to each redundancy data processing unit. The redundancy data processing unit stores a copy of the active data stock of each active data processing unit assigned to it. Each of the active data processing units periodically ascertains changes in its current active data relative to the copy of its active data stored in the redundancy data processing unit and transfers correction data describing any changes. By means of the transferred correction data, the redundancy data processing unit updates its stored copy of the active data and, in the event of the failure of an assigned active data processing unit, assumes the function of the failed data processing unit based upon its stored data copy from the failed data processing unit.

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patent: 32 15 177 (1983-10-01), None

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