backup failed after upgrading to pve9 and pbs4, Device 'drive-tpmstate0-backup' not found

M

MBRjun

New Member
Sep 8, 2025
2
0
1
This error only happens in Windows VM.

Logs

Code: 
vzdump 1010 --mailnotification always --quiet 1 --mailto a@b.c --fleecing '1,storage=local' --pbs-change-detection-mode metadata --mode snapshot --notes-template '{{guestname}}' --storage MBR-PBS


1010: 2025-09-06 12:00:04 INFO: Starting Backup of VM 1010 (qemu)
1010: 2025-09-06 12:00:04 INFO: status = running
1010: 2025-09-06 12:00:04 INFO: VM Name: LS-P3
1010: 2025-09-06 12:00:04 INFO: include disk 'virtio0' 'local-lvm:vm-1010-disk-0' 128G
1010: 2025-09-06 12:00:04 INFO: include disk 'efidisk0' 'local-lvm:vm-1010-disk-1' 4M
1010: 2025-09-06 12:00:04 INFO: include disk 'tpmstate0' 'local-lvm:vm-1010-disk-2' 4M
1010: 2025-09-06 12:00:05 INFO: backup mode: snapshot
1010: 2025-09-06 12:00:05 INFO: ionice priority: 7
1010: 2025-09-06 12:00:05 INFO: creating Proxmox Backup Server archive 'vm/1010/2025-09-06T04:
00:04Z
Code: 
'
1010: 2025-09-06 12:00:05 INFO: enabling encryption
1010: 2025-09-06 12:00:05 INFO: attaching TPM drive to QEMU for backup
1010: 2025-09-06 12:00:05 INFO: could not determine block node size of drive 'tpmstate0-backup' - using fallback
1010: 2025-09-06 12:00:07 INFO: drive-virtio0: attaching fleecing image local:1010/vm-1010-fleece-0.qcow2 to QEMU
1010: 2025-09-06 12:00:07 INFO: issuing guest-agent 'fs-freeze' command
1010: 2025-09-06 12:00:14 INFO: issuing guest-agent 'fs-thaw' command
1010: 2025-09-06 12:00:14 ERROR: VM 1010 qmp command 'backup' failed - Device 'drive-tpmstate0-backup' not found
1010: 2025-09-06 12:00:14 INFO: aborting backup job
1010: 2025-09-06 12:00:14 INFO: resuming VM again
1010: 2025-09-06 12:00:14 INFO: removing (old) fleecing image 'local:1010/vm-1010-fleece-0.qcow2'
1010: 2025-09-06 12:00:14 ERROR: Backup of VM 1010 failed - VM 1010 qmp command 'backup' failed - Device 'drive-tpmstate0-backup' not found
 
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