Linking basic info. Please use the ZFS terms. What is the use case for this system? How many drives are you planning? What kind of VDEV layouts? Mirrors, Raid-Z(1,2,3)? SSDs?
BASICS
iX Systems pool layout whitepaper
Special VDEV (sVDEV) Planning, Sizing, and Considerations
SMR vs CMR ServeTheHome
What’s all the noise about HBA’s, and why can’t I use a RAID controller?