We had an issue while upgrading our Publisher with a newer version of firmware which ended up meaning we had to promote the subscriber to publisher and then remove the cluster to allow the rebuild of the old Publisher.
So now we're in a situation where we have a standalone active Publisher and a standalone inactive Publisher on a newer version of code which we want to put back as a cluster.
My question is, can I create a new cluster with the non active publisher as a subscriber on a newer versions of firmware let them sunc if they will and then promote the subscriber to publisher so I can then upgrade the subscriber to the same code as the publisher or do I have to upgrade the standlone Publisher first and have downtime while it reboots?
Thanks
Jon