I'm slow finding time to attend to my problem. JorgeB answered my big worries. bmartino1 gave great references to docs. It's been a few years since I've had to work with my unraid server; and then I lost power and the power supply. I've just replaced the power supply. The server powers up, but I can't find it on my network. I'm stuck so I'm going to try to install the latest unraid OS on a different USB drive.
No real questions, suggestions will gladly be considered.