I'm relatively new to Nutanix and am trying to get my head around the resulting net usable disk capacity based on the original raw total disk capacity. As I understand it, Nutanix do not implement RAID (at least not in the conventional sense), however the available usable disk capacity diminishes very quickly and I'd like to understand where it all goes!
I've seen the very useful online Nutanix disk calculator tool. While this is a very slick way to establish how much usable capacity will result from a particular disk selection, it does not enlighten one as to how the usable capacity is arrived at. (see: http://http://designbrewz.com/)
One question I have is does the Resiliency Factor (RF) account for the N+1 redundancy rule whereby one should always deduct the disk reource of 1 Nutanix Node to allow fot the failure of one Node without any impact on the remaining system. I don't think it does simply because the usable capacity always seems to be a direct multiple of the numbder of nodes selected.
Any help or advice would be gratefully received as I am striving to calculate our disk sizing requirement for a new Nutanix deployment.