GPT Image

Create GUID Partition Table disk images on local disks. Written in pure Python gpt-image allows GPT disk images to be built on a local filesystem and exported to a destination device.

This is useful for creating a disk image on SD Cards or embedded devices.

Quick Start

import gpt_image

# create a new, 16 MB disk, size is in bytes
disk = gpt_image.disk.Disk("disk-image.raw")
disk.create(16 * 1024 * 1024)

# create a 2MB Linux partition named "boot"
boot_part = gpt_image.partition.Partition(
		"boot", 
		2 * 1024 * 1024, 
		gpt_image.partition.Partition.EFI_SYSTEM_PARTITION
	)
disk.table.partitions.add(boot_part)

# create an 8MB Linux partition named "data"
data_part = gpt_image.partition.Partition(
		"data", 
		8 * 1024 * 1024, 
		gpt_image.partition.Partition.LINUX_FILE_SYSTEM
	)
disk.table.partitions.add(data_part)

# commit the change to disk
disk.write()

# dump the current GPT information:

print(disk)

The final print(disk) command will output a JSON document of the current GPT configuration:

{
  "path": "disk-image.raw",
  "image_size": 16777216,
  "sector_size": 512,
  "primary_header": {
    "backup": false,
    "signature": "EFI PART",
    "revision": "\u0000\u0000\u0001\u0000",
    "header_size": 92,
    "header_crc32": 3533962731,
    "reserved": 0,
    "my_lba": 1,
    "alternate_lba": 32767,
    "first_usable_lba": 34,
    "last_usable_lba": 32734,
    "disk_guid": "3f09c9fe-66ea-4c67-b0fb-fd35906b393a",
    "partition_entry_lba": 2,
    "number_of_partition_entries": 128,
    "size_of_partition_entries": 128,
    "partition_entry_array_crc32": 673632436
  },
  "backup_header": {
    "backup": true,
    "signature": "EFI PART",
    "revision": "\u0000\u0000\u0001\u0000",
    "header_size": 92,
    "header_crc32": 727034965,
    "reserved": 0,
    "my_lba": 32767,
    "alternate_lba": 1,
    "first_usable_lba": 34,
    "last_usable_lba": 32734,
    "disk_guid": "3f09c9fe-66ea-4c67-b0fb-fd35906b393a",
    "partition_entry_lba": 32735,
    "number_of_partition_entries": 128,
    "size_of_partition_entries": 128,
    "partition_entry_array_crc32": 673632436
  },
  "partitions": [
    {
      "type_guid": "C12A7328-F81F-11D2-BA4B-00A0C93EC93B",
      "partition_name": "boot",
      "partition_guid": "67ed0675-9d44-46a6-bc29-99a2778e7563",
      "first_lba": 40,
      "last_lba": 4135,
      "alignment": 8,
      "size": 2097152,
      "attribute_flags": []
    },
    {
      "type_guid": "0FC63DAF-8483-4772-8E79-3D69D8477DE4",
      "partition_name": "data",
      "partition_guid": "1a44bc84-bb53-4f9f-b699-1d1268bfdbfa",
      "first_lba": 4136,
      "last_lba": 20519,
      "alignment": 8,
      "size": 8388608,
      "attribute_flags": []
    }
  ]
}

MIT License

Copyright (c) 2021 Scott Wysocki

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.