There are a number of ways to implement SDS, including as a software-only solution. This method allows the user to provide the hardware, even re-purposing existing equipment in some cases. There are a number of user benefits to leveraging SDS technology in this way, as Nexenta does.
For more details on how manufacturers are implementing software-defined storage technologies, and what benefits they can deliver, tune in to this on-demand webinar with StorageSwiss Founder, George Crump and Thomas Cornley from Nexenta.