RECOMMENDED CONFIGURATIONS - DISPERSED VOLUME

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Hi

I'm looking for an advise to configure a dispersed volume. 
I have 12 servers and would like to use 10:2 ratio.

Yet RH recommends 8:3 or 8:4 in this case: 

https://access.redhat.com/documentation/en-US/Red_Hat_Storage/3.1/html/Administration_Guide/chap-Recommended-Configuration_Dispersed.html

My goal is to create 2PT volume, and going with 10:2 vs 8:3/4 saves a few bricks. With 10:2 I'll use 312 8TB bricks and with 8:3 it's 396 8TB bricks (36 8:3 slices to evenly distribute between all servers/bricks)

As I see it 8:3/4 vs 10:2 gives more data redundancy (3 servers vs 2 servers can be offline), but is critical with 12 nodes? Nodes are new and under warranty, it's unlikely I will lose 3 servers  at the same time (10:2 goes offline). Or should I follow RH recommended configuration and use 8:3/4? 

Thank you.
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