Stored program control: Difference between revisions

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Synchronous duplex mode: Distinguish between transient and hard faults
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It is possible that a comparator fault occurs only due to transient failure which is not shown even when check out program is run. In such case three possibilities exists:
 
*Continue with both processors
*#Continue with both processors
#Take out the active processor and continue with the other.
*#Continue with active processor but remove other processor from service.
 
ThisThe schemefirst is based on the assumption that the fault is transient one and may not appear again. HereIn the other cases, the processor taken out is subjected to extensive testing to identify a marginal failure in these cases.
 
====Load-sharing mode====