Proxmox Backup Server: Why Pruning Old Backups Doesn't Free Any Disk Space
Prune jobs on Proxmox Backup Server remove backup references, not the underlying data. Here's why your datastore keeps filling up and how garbage collection actually works.
$ ls ./backups
Backups
pmxcfs and the Backup Blind Spot Hiding in /etc/pve
Proxmox stores its config as a SQLite database wearing a filesystem costume, and vzdump doesn't touch it. Here's what that means for disaster recovery.
Your Backup Job Says 'Success.' That Doesn't Mean the Data Is Restorable.
A backup that reports success can still be silently useless. Here's how to build a restore test you actually run, using restic as the example.