What is software-defined storage? Software-defined storage (SDS) is a software-based storage solution that provides greater flexibility and independence than the traditional network-attached storage (NAS) or storage area network (SAN). Although software-defined storage can work in and on top of both NAS and SAN environments, it is usually created to perform on the industry common x86 servers.
Software-defined storage allows for separation and independence from traditional hardware...
If you need cheap storage, but still need high availability, it's a good product to look at.