Comment 3 for bug 1558807

Hmm, might be that when nova attaches the volume it's assuming /dev/vdb is available and that's what it tells cinder it's going to attach to:

https://github.com/openstack/nova/blob/a023c32c70b5ddbae122636c26ed32e5dcba66b2/nova/virt/block_device.py#L304

But the block_device_info code isn't taking into account the config drive? Probably need ndipanov to look at this.