@NikitaKipriyanov You are still missing the point. The question was not about installing any particular operating system. It wasn’t about a new install. It was about getting a server back up and running again. I would have been quite happy to install a different OS if that was the answer. I don’t see how a question about a specific server fault is off topic on a site called Server Fault.

@NikitaKipriyanov Just like the person who commented on the question you seem to have completely misunderstood it. The question had NOTHING TO DO WITH THE OPERATING SYSTEM. The question was about getting the server to boot. I simply listed what I had tried as I thought that was the rules of the site. If installing a different OS was the solution then it SHOULD HAVE BEEN WRITTEN AS AN ANSWER. As it turned out the problem was the driver for the storage controller. Nothing to do with the OS. The server has now been running Server 2019 flawlessly for weeks.