Finally, after another day in my live spend with URBACKUP, i want to share my noob knowledge with the community:
Main point: For disaster recovery, it is enough when you have a copy of the BackupFILES which Urbackup creates into the “Backup Storage Path”
You can mount the images via assemeling and decompressing:
UrBackup - Server administration manual
10.7 Assemble multiple volume VHD images into one disk VHD image
If you want to restore the images via the restore cd.iso but your Urbackupserver has gone crashed/exploded/fishing/missing:
Fresh install of Urbackupsrv
Copy Paste the files from the “urbackup storage path” (which of course, you made a copy of, before your server crashed from an external drive/FTP Server whatever)
Copy/paste Urackupsrv Database + files of Urbackup in the specific folder (linux var/Urbackup Windows UrbackupServer/urbackup) - so that Urbackupsrv has all the settings like your old one.
Check if you can reach the Urbackupsrv via your Internet Browser and if your Backups show up.
Launch Restore cd.iso on a new machine
Fresh install of Urbackupsrv has to be the same (windows or Linux) like you had already running.
Always check option “Automatically backup UrBackup database” in settings of urbackupsrv, so you always have the database files in your “Backup storage path” included.
At least that worked for me when I was testing today for a disaster recovery.
Since i have Urbackupserver running on a VM Linux Machine which is located on a Microsoft HyperV Host, Backing up my VMs where urbackupclient is running on every vm, my worst case scenario would be that my hyperv Host gets currupted/goes on holiday/gets COVID and i can´t restore my Images. But with a Backup of your BackupFILES, it is no Problem to restore your Urbackupserver on a new machine or restore the Backups directly out of the .vhdz files.
Also this solution as posted before, sounds great, but it is too complicated for a noob like me:
Have a great backup day!
EDIT: Getting a lot of errors when trying to reassamble the images, i give it another try tomorrow…