Using Proxmox Backup Server 3.3.3 with Proxmox VE 6.2-4

[Daniel_Dog]

Just because you updated pve to 6.4 and thus has a add pbs button, does not mean it is compatible.
If I am not mistaken, the pve 6.4 intergration with pbs is based on pbs 1.* and not 3.*

And I am not saying that it will not work, but I will saying that you need to be careful.
As it may work but also may not work.

 

[fabian]

it should work fine, we try very hard to stay backwards compatible there the other way round (newer client when doing the backup, older client when attempting to restore) might not work, depending on used features.

testing your backups before nuking the original data is always a good idea though, if only to ensure that you actually backed up what you thought and that it worked properly!

 

[Mucip]

Hi,
I connected but I got below error unfortunately while backing up on PBS.

INFO: VM Name: win10
INFO: include disk 'scsi0' 'disk2:101/vm-101-disk-0.qcow2' 150G
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: creating Proxmox Backup Server archive 'vm/101/2025-03-07T21:49:50Z'
ERROR: PBS backups are not supported by the running QEMU version. Please make sure you've installed the latest version and the VM has been restarted.
INFO: aborting backup job
INFO: resuming VM again
ERROR: Backup of VM 101 failed - PBS backups are not supported by the running QEMU version. Please make sure you've installed the latest version and the VM has been restarted.
INFO: Failed at 2025-03-08 00:49:50
INFO: Backup job finished with errors
TASK ERROR: job errors

Regards,
Mucip

 

[Mucip]

Hi again,
Any solution about above problem please?

Regards,
Mucip

 

[leesteken]

ERROR: PBS backups are not supported by the running QEMU version. Please make sure you've installed the latest version and the VM has been restarted.

Hi again,
Any solution about above problem please?

Assuming you restarted or stopped the VM after upgrading to the latest PVE 6.4, there is not much you can do. Did anyone already tell you how old and unsupported PVE 6.4 is?
How did you make backups before? Maybe use normal PVE backups (to zstd files) instead of PBS? Or follow the guides to upgrade to (the also unsupported!) PVE 7.

 

[Mucip]

Hi,
After I update the proxmox to 6.4, I did not restart server or VM's either.
Should I restart server?

Regards,
Mucip

 

[leesteken]

After I update the proxmox to 6.4, I did not restart server or VM's either.

It literally in the error message: ... and the VM has been restarted. Rebooting the Proxmox host after upgrading is also a good idea. Best of luck with your backups and upgrades.

 

[Mucip]

Hi,
OK. I think I MUST upgrade to 8. No way out!
Well, I will backup all VM's to external disk or disks.
I will fresh install newst Version 8.
Than restore from backups again.

Should I do/backup anything else before fresh install? Especially proxmox configs? Any advice please?

Regards,
Mucip

 

[Mucip]

It literally in the error message: ... and the VM has been restarted. Rebooting the Proxmox host after upgrading is also a good idea. Best of luck with your backups and upgrades.

Hi,
I've got good news.

I rebooted the Proxmox Server 6.4 and now it started to backup on PBS without above error message finally.

But in any case I will fresh install as soon as possible for sure...

Regards,
Mucip