baseboard-octopus/scripts/disk_layout.json

{
  "_comment": "See http://www.chromium.org/chromium-os/developer-guide/disk-layout-format",
  "metadata":{
    "rootdev_base": "/sys/devices/pci0000:00/0000:00:1c.0/mmc_host/mmc0/mmc0:0001/block/mmcblk0"
  },
  "parent": "legacy_disk_layout.json",
  "layouts": {
    # common is the standard layout template.
    "common": [
      {
        # Kernel for Slot A, no file system.
        "num": 2,
        "label": "KERN-A",
        "type": "kernel",
        "size": "32 MiB"
      },
      {
        # Kernel for Slot B, no file system.
        "num": 4,
        "label": "KERN-B",
        "type": "kernel",
        "size": "32 MiB"
      },
      {
        # Slot B rootfs. Updated for more space, like Slot A below
        "num": 5,
        "size": "4096 MiB"
      },
      {
        # Slot A rootfs. Adjust to allow for more space.
        "num": 3,
        "fs_size_min": "2300 MiB",
        "size": "4096 MiB"
      }
    ],
    "usb": [
      {
        # TODO(adlr): see why stacking logic fails, thus requiring this section
        # in this file
        "num": 5,
        "size": "2 MiB"
      },
      {
        "num": 3,
        "size": "2400 MiB"
      }
    ],
    # Used for factory install images. No need to adjust fs size or partition
    # size since these do not need more space.
    "factory_install": [
      {
        "num": 5,
        "size": "2 MiB"
      },
      {
        "num": 3,
        "size": "420 MiB",
        "fs_size_min": "400 MiB",
        "fs_size": "400 MiB"
      }
    ],
    # Huge rootfs, suitable for VM only images, should not be used
    # for actual hardware devices.
    "16gb-rootfs": [
      {
        # Kernel for Slot A, no file system.
        "num": 2,
        "label": "KERN-A",
        "type": "kernel",
        "size": "32 MiB"
      },
      {
        # Kernel for Slot B, no file system.
        "num": 4,
        "label": "KERN-B",
        "type": "kernel",
        "size": "32 MiB"
      },
      {
        "num": 5,
        "size": "2 MiB"
      },
      {
        "num": 3,
        "fs_size": "16000 MiB",
        "size": "16384 MiB"
      }
    ]
  }
}