Recently we had a problem with disk where OS istalled, then we replace the disk and reinstall os and Urbackup Server.
On other disk which store the backups (storagefolder) we have a Raid10 4tb with btrfs partitions.
To troubleshoot we store the files on /var/urbackup in a Symlink to folder on urbackupfolder and restore this link.
2nd Step, we ran urbackupsrv remove-unknown, and it take a lot of time.
after when we start server, older backups are not showed on gui, but the file and folder are stored on this partition and visible on terminal
i think is it can be a permission prioblem, however i still not solved this , so curious but the owner of folder is geoclue/ group saned
Is UrbackupServer running as geoclue? if not, change them to what urbackup is running and it might fix it.
It might have to do with your new urbackupserver installation got a different UID and GID than it had on your old installation. If you are curious, you can use ls -n to get numerical ids instead of names.