Done deal. Loaded Windows Server 2012 R2 Standard then had to reactivate every single drive. I didn't plug in one of the SAS connectors into the LSI controller all the way so 4 drives were missing and 2 of my mirrored arrays went goofy. But at the end of the day all was sorted out so all is well. Hopefully I can stick with 2012 R2 for a long time. I really don't enjoy redoing a server. Especially when it's got 20 HDs in it spread across 3 controllers.