FWIW, I'm choosing AZCS for a 2.5PB FlexArray cold storage solution because in my case capacity trumps performance needs and my controller is a FAS8080. 

I know that's not a data point you're looking for, so when I get an idle day or so I'll try an A/B test with BCS/AZCS. 

On Aug 21, 2015, at 7:54 PM, Basil <basilberntsen@gmail.com> wrote:

Does anyone have any advice regarding checksums for array LUNs? My understanding is that AZCS saves you about 12% capacity but requires more filer CPU utilization for reads. What kind of impact does it have? 

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