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Message Posted: Mon, 06 Jan 2003 @ 19:13:34 GMT

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Subj:   Re: Incremental Benefit of Fallback
From:   Belle, Patrick A

RAID protects you from a drive failure. If an entire RAID group fails (for whatever reason), you'll need to recover any non-fallback tables on your system.

Some reasons for an entire RAID group failure include:

Cabinet level failure of your disk array cabinet Loss of all nodes in a clique before any pending updates could be saved

I suppose there are other (more obscure) reasons. I don't have a good feeling for how frequent either of above phenomena would occur (I suspect quite in-frequent).

Pat Belle
Teradata Certified Master

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