Although thats an excellent suggestion but in the end I attached an old usb backup drive and restarted and held down the Option key to select it to boot. Then it went into Disk Utility, and I reimaged the 2nd drive to the new drive. After the reimage I restarted and held down the Option key to allow me to select the first drive.
The only issue I had was to rename my boot drive back to Server HD, which I did by using Finder and one more restart.
I guess the rule is you cannot unmount the boot original boot drive unless you boot from an external drive.
All is good now and thank you.