I was told by CoPilot a couple weeks ago it is indeed GA.  The "check for update" tool doesn't do anything unless Copilot releases the update to your system.  So you'd want to give them a call so they can do that first, then the new version should show up. 

Hi,

It doesn’t look like it has released yet, but it will be coming out for the SC4020.

hey,

can you point out some reviews for 7.3?

https://blog.workinghardinit.work/2018/08/13/sc-series-scos-7-3/ 

The idea of Distributed Spare is a great new feature.  Rebuild times will be much faster.  I'm looking forward to it.  I think it's going to be released in October.

Trying to find public release notes on 7.3 and 7.3.x versions and having a hard time. Anything out there?

Storage Center 7.3 Release Notes https://topics-cdn.dell.com/pdf/storage-sc2000_release-notes31_en-us.pdf Dell Storage Center OS 7.3 technical publications <ADMIN NOTE: Broken link has been removed from this post by Dell> Let us know if you need anything further.

The Dell EMC SC Storage team released SCOS 7.3.3 on September 28, 2018 as general availability (GA) to provide new features and maintenance updates. Please review the SCOS 7.3.3 release notes for further details. Please call in to Dell support for assistance.