StarWind Software

I'm trying to learn SAN; I don't have hardware but another Redditor mentioned that I could use a single computer with partitions or virtual hardrives and play about with a configuration tool like Starwind Virtual SAN? Is it an OS, a simple program? What is the benefit of using Starwind Virtual SAN? Are there alternatives?
Update: My issue has been solved, thank you.

Hi,

Thank you for your question.
Here is the thread where we answered exactly the same question https://forums.starwindsoftware.com/vie ... %3F#p30814.