virsh list --all
 Id   Name                  State
--------------------------------------
 2    avocado-vt-vm1        running

# virsh domblklist avocado-vt-vm1
 Target   Source
-------------------------------------------------------------
 vda      /mnt/nfs/images/RHEL-9.4-x86_64-latest-ovmf.qcow2

# cat usb.xml
<disk type='block' device='cdrom'>
 <driver name='qemu' type='raw'/>
 <target dev='hdc' bus='usb'/>
</disk>

# virsh attach-device avocado-vt-vm1 usb.xml
error: Disconnected from qemu:///system due to end of file
error: Failed to attach device from usb.xml
error: End of file while reading data: Input/output error

# grep -i device_add /var/log/libvirt/virtqemud.log
2024-08-16 03:19:44.335+0000: 69016: info : qemuMonitorSend:838 : QEMU_MONITOR_SEND_MSG: mon=0x7f08f0003010 msg={"execute":"device_add","arguments":{"driver":"usb-storage","bus":"usb.0","port":"2","id":"usb-disk2","removable":false},"id":"libvirt-14"}
2024-08-16 03:19:44.335+0000: 69037: info : qemuMonitorIOWrite:339 : QEMU_MONITOR_IO_WRITE: mon=0x7f08f0003010 buf={"execute":"device_add","arguments":{"driver":"usb-storage","bus":"usb.0","port":"2","id":"usb-disk2","removable":false},"id":"libvirt-14"}
2024-08-16 03:19:44.392+0000: 69016: debug : qemuMonitorJSONCheckErrorFull:354 : unable to execute QEMU command {"execute":"device_add","arguments":{"driver":"usb-storage","bus":"usb.0","port":"2","id":"usb-disk2","removable":false},"id":"libvirt-14"}: {"id":"libvirt-14","error":{"class":"GenericError","desc":"drive property not set"}}
2024-08-16 03:19:44.392+0000: 69016: error : qemuMonitorJSONCheckErrorFull:366 : internal error: unable to execute QEMU command 'device_add': drive property not set