Min/Max disks required per tier for SC8000/Sc4020

Hi Guys,

I currently have multiple SC8000 controllers, and I am just trying to find some solid info.

I want to know what the min number of disks is required per Tier and what he max allowed is?

I cant seem to find this info anywhere for Sc8000 or the 4020.

Any help or pdfs or anything would be greatly appreciated 

Cheers,