Comment 2 for bug 1648501

Mohamed, could you please clarify which version of Nova are you using? I tried this on my master (Ocata) devstack and see the proper (in my opinion) error:

{"badRequest": {"message": "Block Device Mapping is Invalid: Boot sequence for the instance and image/block device mapping combination is not valid.", "code": 400}}

as you can't specify both `imageRef` and `boot_index=0` at the same time.