VNX 5200 RAID5 configuration for storage pool

Question

Hi,

I know that EMC recommends using (4+1) or (8+1) configuration for RAID5 for Perfomance tire

I do understand the minimum recomendation (4+1) - in order to achive good perfomance and get more usable space

I do understand the maximum recomdation (8+1) - it's mainly due to availability risks

But why the configurations in between - (5+1), (6+1), (7+1) is not recommended

Can anyone explain ?

ZaphodB · Answer

The shortest answer is that it is a binary world in there, and dividing things by two, and powers of two, is way easier than chopping things into sevenths...

Rainer_EMC · Answer

41R5 and 81R5 have performance advantages due to the code and other internal values like block size, element size, ….

VNX

VNX 5200 RAID5 configuration for storage pool

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