Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2005-09-20
2005-09-20
Beausoliel, Robert (Department: 2114)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C714S048000
Reexamination Certificate
active
06948092
ABSTRACT:
A computer system includes a primary processor and a secondary processor running in lockstep. The lockstep may or may not be synchronous. Errors occurring in the primary processor or the secondary processor are reported to an error-handling module. If the error is a recoverable error, the state of one of the processors is saved and the processors are restarted using the saved state. In addition to the reporting of errors from the processors, cross checking of the operation of the processors is performed to detect a divergence in the operation of the processors. If the divergence is reported to be due to a recoverable error, the state of the one of the processors is saved and the processors are restarted using the saved state. Procedures are also disclosed to ensure that data corruption does not propagate onto an associated network, and to ensure that the system is not lost as a network resource during processor restart.
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IEEE 100, “The Authoritative Dictionary of IEEE Standards Terms”, Seventh Ed., The Institute of Electrical and Electronics Engineering, Inc., 2000, pp. 128, 129.
Bunton William P.
Jardine Robert L.
Klecka James S.
Kondo Thomas J.
Stott Graham B.
Beausoliel Robert
Hewlett--Packard Development Company, L.P.
Matthew Aaron D.
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