Backup Server

Setup Prune and Garbage Collection job, otherwise

Proxmox Backup server stores the data in .chunks folder and only indexes new additional data to

Add existing Datastore to pbs

Description:

https://pve.proxmox.com/wiki/Passthrough_Physical_Disk_to_Virtual_Machine_(VM)

Conclusion:

# After having created a datastore in pve which points to e.g. /tmp  
# mount internaldisk to vm (external can be mounted via hardware options)   
find /dev/disk/by-id/ -type l|xargs -I{} ls -l {}|grep -v -E '[0-9]$' |sort -k11|cut -d' ' -f9,10,11,12  
# mount disk e.g.:  
mount /dev/sdb1 /mnt/backup  
# edit datastore config to point to actual datastore  
nano /etc/proxmox-backup/datastore.cfg  

Now the existing backups should be visible in datastore/content

Backup Retention Explanation:

https://pbs.proxmox.com/docs/prune-simulator/index.html

Sync Backups between two Backup Servers

This method is to prefer if two or more backup server exist ! The instance one does the backups, the other sync only!
There is a option to sync the backups, click onto the datastore in the backup server and click on "Sync Jobs"
Add everything in for the second Backup Server and start syncing