{
  "type": "devices",
  "content": {
    "sda": {
      "type": "table",
      "format": "msdos",
      "partitions": [
        { "type": "partition",
          "start": "1M",
          "end": "100%",
          "bootable": true,
          "content": {
            "type": "filesystem",
            "format": "ext4",
            "mountpoint": "/"
          }
        }
      ]
    }
  }
}