drive-scsi0-0-1
filename    : 'json:{"lun": "0", "portal": "example.com:3260", "driver": "iscsi", "transport": "tcp", "target": "iqn.2016-09.com.example:server"}'
format node : '#block301'
format drv  : 'raw'
storage node: '#block250'
storage drv : 'iscsi'

drive-virtio-disk0
filename    : 'json:{"lun": "0", "portal": "example.com:3260", "driver": "iscsi", "transport": "tcp", "target": "iqn.2016-09.com.example:server"}'
format node : '#block169'
format drv  : 'raw'
storage node: '#block038'
storage drv : 'iscsi'