Hello, I'm trying to using virsh update-device to update the CDROM from type='file' to ceph rbd iso with type='network'. But I always get error: Failed to update device from disk error: internal error: unable to execute QEMU command 'change': error connecting: Operation not supported I'm using libvirt-libs-3.10.0-1.el7.x86_64 with centos7.4 my original cdrom xml: <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='hdc' bus='ide' tray='open'/> <readonly/> <alias name='ide0-1-0'/> <address type='drive' controller='0' bus='1' target='0' unit='0'/> </disk> my rbd cdrom xml: <disk device="cdrom" type="network"> <driver name='qemu' type='raw'/> <auth username="zstack"> <secret type="ceph" uuid="efd3eb93-014f-4a0f-ba1f-84d7e70c9a89"/> </auth> <source name="ssd/4922ebebd7b52f11bf13b3a482b6ab7e@4922ebebd7b52f11bf13b3a482b6ab7e" protocol="rbd"> <host name="192.168.250.35" port="6789"/> </source> <target bus="ide" dev="hdc"/> <readonly/> </disk> Send command '{"execute":"change","arguments":{"device":"drive-ide0-1-0","target":"rbd:ss d/4922ebebd7b52f11bf13b3a482b6ab7e@4922ebebd7b52f11bf13b3a482b6ab7e:auth_sup ported=none:mon_host=192.168.250.35\\:6789","arg":"raw"},"id":"libvirt-286"} ' which seems it pass the auth_support=none to the qemu, while I'm using an authentication ceph, it should use auth_support=cephx instead. I also tried to boot the VM with rbd iso and then update-device to another rbd iso, but got no luck with the same error. I have succeeded to update-device with libvirt-1.3.3, I noticed that it depends on the orig_disk->privData->secinfo, and in my environment it will be null which leads to the auth_support=none. So I'm wondering if this is a bug or I did something wrong with my configuration. Thanks in advance, Best Regards, Chao