Linux.com - https://www.linux.com/news/software-defined-storage-or-hyperconverged-infrastructure
It’s easy to get software-defined storage (SDS) confused with hyperconverged infrastructure (HCI). Both solutions “software-define” the infrastructure and abstract storage from the underlying hardware. They both run on commodity servers and pair well with virtualization. Reporters, analysts, vendors and even seasoned IT professionals talk about them in the same breath.