Hey,
As you have mentioned, S2D doesn't support RAID array. It needs direct access to the drives, as a lot of SDS solutions. In any case, S2D doing a great job in proper scenarios.
Speaking about StarWind VSAN free version, it will allow you creating a 2-node replicated storage pool for a Windows Server 2019 Failover Cluster. The only limitation is you have to work through PowerShell (no GUI available).
https://www.starwindsoftware.com/resource-library/starwind-virtual-san-free-vs-paid/
Our engineers assist our customers, who use free version, on our forum. Worth mentioning, that you can upgrade to commercial version at any time.
Cheers,
Alex Bykovskyi
StarWind Software
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