Rack failure protection can be achieved by assigning chassis to different Protection Domains (aka Zones).
Protection Domains: Protection domains at the chassis level allow scaling of NetApp HCI clusters in such a way that
the failure of an entire chassis can be sustained even if there is more than one storage node in the chassis. The minimum allowed configuration is 3 chassis with 2 storage nodes each. The system automatically lays out data correctly when the configuration is compatible with
NetApp, NetApp HCI [HCI]/1.4, x86
Rack Failure Protection, Reads/Writes, Data Availability