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  3. March 2011

RE: Cache battery and Raid Controller Design WAS: Re: Rép. : Question of a Newbie to POWER Systems

Vern--

I agree that the battery is only to protect the cache memory.

My question is: won't OS/400 (i) write the cache back to disk during idle moments, so that, on a mostly idle system, won't user data more likely than not still be protected? I remember someone mumbling something about the data in cache being flagged as 'clean' or 'dirty,' clean being written back, and dirty not written back...

Paul E Musselman


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