I know technically speaking if we have any questions it's recommended to not ask them here but to log a case with support. I just think as this is a quick question and may have a useful R&D related outcome I might get away with asking it....
I have a repository which I'd like to clear of all data and allow the backup jobs to repopulate with fresh data.
One way to do it might be to tick the 'rotated hard drives' setting on the repository. But that doesn't work as the repository has GFS backups in it and the software won't allow me to enable rotated hard drives.
The only other way I can think of is to duplicate each of the jobs and delete the old jobs and data. But that will take a while as there's 57 jobs.
It could be possible, that with removing the metadata file, you don't need to remove it from the database after the rescan. But I'm not sure about that
I think you're right on the last point. If you empty the folder completely it starts building a new backup. Perhaps this is because these are backup copy jobs.