After resizing the size of a virtual disk for a Proxmox VM, subsequent jobs might start failing.

VM Backup stores backup state information for Proxmox VMs under the following directory:

/var/lib/hse-vmb/pve-storage/hse-vmb-store/

If the VM disk size is changed, the existing 'backup-state' file for the relevant VM may no longer match the current VM configuration.

Solution

Rename the 'backup-state' file for the affected VM when there are no active jobs on VM Backup. Afterwards, run a manual backup. VM Backup will then recreate the 'backup-state' file using the updated information.

To rename the file, follow the steps below:

1. Browse to the Proxmox VE web interface
    
2. Select the relevant node and open > [Shell]
   
   
    
    
3. Browse to the VM Backup storage directory:
   cd /var/lib/hse-vmb/pve-storage/hse-vmb-store/
    
4. Locate the 'backup-state' file for the affected VM. 
   If the VM ID is 100, the file will be named 'backup-state-100.json'
    
5. Rename the 'backup-state-100.json' file to 'Old_backup-state-100.json' by running the following command (replace '100' with the relevant VM ID):
   mv /var/lib/hse-vmb/pve-storage/hse-vmb-store/backup-state-103.json /var/lib/hse-vmb/pve-storage/hse-vmb-store/OLD_backup-state-100.json
    
6. Run a new backup for the affected VM

Do not rename other 'backup-state' files for other VMs unless required.

If the issue persists after renaming the 'backup-state' file and running a backup, please contact support by opening the button below "Submit a Request".