Hello All, instance created from images with the following metadata: hw_disk_bus=scsi hw_scsi_model=virtio-scsi do not allow to attach new volume. Deletting the above metadata in the image and creating a new instance, it allows new volume attachment. I got the same behaviour on all openstack releases from liberty to ocata. Regards Ignazio -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-operators/attachments/20170727/f4d73b97/attachment.html>