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Exchange corruption and Exchange 2007

Posted on 2011-09-10
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Hi

We are running Exchange 2007 SP2 - a mixture of CCR and SCC clusters. All clusters have an SCR target in another data center.

We've had Exchange database corruption problems before on our CCR clusters, and generally we fail them over to the passive CCR node. We then reseed the offending DB on the old active.  Is this the right way to do things? From what I understand, CCR replication will not replicate corruption.

However ,how about if we have DB corruption errors on the SCC clusters? Since there is only one set of data, failing over wouldn't help would it?

And how does SCR fit into all this?
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Question by:wyclef1
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by:endital1097
ID: 36516926
SCC does only have one copy of the database so a failover would not change anything
CCR replicates logs from one node to the other and replays the transactions, so it is possible that corruption could follow
SCR allows you to configure a replay lag time which would give you an opportunity to stop log replay before the corruption occurs (still difficult to catch but possible)
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by:wyclef1
ID: 36516994
Hello endital1097

Thanks for the reply, so if we had the database corruption issues on CCR, you're saying that failing over to the passive CCR node wouldn't really help as the corruption could follow? I thought the point of the Inspector Directory was to prevent corruption replicating to the passive node?
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endital1097 earned 2000 total points
ID: 36520383
the inspector directory verifies that the log files are valid (validates the checksum) and the copies to the database directory. if it is not valid it requests a new copy.

it is possible that the database on the passive node could become corrupt to due to hardware issues
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