Cannot detach cinder volume when attached as a cdrom

Issue

• Launched an instance with the following command and received an error:

[root@aio ~(admin)]# nova boot --flavor m1.small --image CentOS-6.6-gen  --nic net-id=cd65ac88-f60a-4af9-8b17-62e18bb9127f --block-device id=3ab8f80f-d71d-4c23-bc69-8d2c5d04ce3b,source=volume,dest=volume,bus=ide,size=1,device=/dev/vdb,type=cdrom,bootindex=1 VM-cdrom

libvirtError: Operation not supported: disk device type 'cdrom' cannot be detached`

• The problem is that a volume attached as type=cdrom can not be detached neither via horizon nor via command line .
• Volume attached as cd-rom at boot can not be detached.