SCOS07.03.10 is slated to be release as General Availability in early October 2018. You can see information at this website:   Dell Storage Center OS 7.3 technical publications <ADMIN NOTE: Broken link has been removed from this post by Dell>
Is SCOS 7.3 available from Co-pilot for the SC4020's? The reviews sound amazing. Jason
SCOS 7.3