Unplugged USB stops backup

L

lukyjay

Well-Known Member
Aug 18, 2020
34
9
48
Hi

For some reason the backup from PVE to PBS fails if a USB device is missing. See the last line.

This does not seem logical.

Code: 
100: 2026-04-08 01:00:02 INFO: Starting Backup of VM 100 (qemu)
100: 2026-04-08 01:00:02 INFO: status = stopped
100: 2026-04-08 01:00:02 INFO: backup mode: stop
100: 2026-04-08 01:00:02 INFO: ionice priority: 7
100: 2026-04-08 01:00:02 INFO: VM Name: docker100
100: 2026-04-08 01:00:02 INFO: include disk 'scsi0' 'local-zfs:vm-100-disk-0' 150G
100: 2026-04-08 01:00:02 INFO: include disk 'efidisk0' 'local-zfs:vm-100-disk-1' 1M
100: 2026-04-08 01:00:02 INFO: creating Proxmox Backup Server archive 'vm/100/2026-04-07T17:00:02Z'
100: 2026-04-08 01:00:02 INFO: starting kvm to execute backup task
100: 2026-04-08 01:00:02 ERROR: USB Mapping invalid (hardware probably changed): usb device '1a6e:089a' not found
100: 2026-04-08 01:00:02 INFO: aborting backup job
100: 2026-04-08 01:00:02 ERROR: VM 100 not running
100: 2026-04-08 01:00:02 ERROR: Backup of VM 100 failed - USB Mapping invalid (hardware probably changed): usb device '1a6e:089a' not found

Thanks
 
In your PVE, if you look at that VMs "Hardware" section, whats configured in there? Is there a USB device? Try removing that USB device from the hardware section and running the backup again.
e.g.
Screenshot_20260410_163204.png
 
Neobin said:
To be able to start a VM, all assigned hardware/resources must be available/accessible.
Click to expand...
This doesn't make a lot of sense of hot-pluggable devices though

I got around it by passing the USB port instead of the USB device but I hope you can see value in removing this limitation

The risks of not backing up a whole VM outweigh the risks of backing up a VM without a hot-pluggable device connected
 
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