backup fails with "doesn't support requested feature..." and "Unable to activate storage..."

odecroupette

New Member
Aug 26, 2025
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0
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Hi,

i'm new to proxmox and learning various aspects of it. For this case, I'm running a Hackintosh sucessfully in a VM. But trying to take a backup of it fails repeatedly with such messages:
Code:
kvm: warning: host doesn't support requested feature: CPUID.07H:EBX.invpcid (bit 10)
...
kvm: warning: host doesn't support requested feature: CPUID.07H:EDX.ssbd (bit 31)
ERROR: got timeout
INFO: aborting backup job
ERROR: VM 108 qmp command 'backup-cancel' failed - unable to connect to VM 108 qmp socket - timeout after 5991 retries
VM 108 qmp command 'query-status' failed - unable to connect to VM 108 qmp socket - timeout after 51 retries
no lock found trying to remove 'backup'  lock
ERROR: Backup of VM 108 failed - got timeout
INFO: Failed at 2025-08-26 17:05:10
INFO: Backup job finished with errors

My backup is on a NAS under SMB/CIFS, defined a storage and worked ok so far for other VMs.
Any idea what's the cause and how to sort it out?