While in the Server-Manager, I attempted to restore a directory of files. After selecting the most recent rotated backup, I hit "next" hoping to find an option to filter for the files I wanted. Instead, it went into full restore mode. I was afraid to stop it, and let it go on for a full restore, but it stopped at one file. I left it a couple of hours, but clearly it was not progressing further. I exited the Restore mode to another part of the Server Manager where I was warned that the system needed a reboot, else would be unstable. I rebooted, and the reboot halted with the warning that the restoration had been incomplete and I should consult the user manual. Repeating this gets the same result. My system is down. I see no references in any of the online documentation.
Why did the restore hang? What necessary steps must I take to restore my system?