Skip to main content
Service phase: Beta

This service is still in development. Give us your feedback or view this page on the current PRONOM service.

Format

UDF Disc Image

Summary

Name
UDF Disc Image
Identifiers
PUID: fmt/1738
Format type
Aggregate
Description
UDF Disc Image is a format that stores contents and structure of an optical disc which can be transferred on the other media. It uses Universal Disk Format (UDF) file system developed for optical media by the Optical Storage Technology Association (OSTA). It is a portable format that is recognized by several operating systems, and considered to be a successor of ISO 9660 capable to manage read/write media in better capacity. UDF is used for computer data storage for a broad range of media, including DVDs and Blu-Ray disks. A disk image is a uncompressed copy of the contents of a disk or a folder, it can facilitate certain types of backup and recovery strategies. Please see ID: fdd000348 from Library of Congress and other links attached to this entry for further information.
Note
http://fileformats.archiveteam.org/wiki/Universal_Disk_Format https://www.loc.gov/preservation/digital/formats/fdd/fdd000348.shtml https://en.wikipedia.org/wiki/Optical_disc_image https://docs.microsoft.com/en-us/windows/win32/imapi/disc-formats
File extensions
toast, iso, cdr, dmg
Source
The Church of Jesus Christ of Latter-Day Saints / The Church of Jesus Christ of Latter-Day Saints

Relationships

Has lower priority than
Is subtype of
Is supertype of

Internal signatures

UDF Disc Image

Note
BOF; Offset: 32768; Max Offset: 36864; Magic Bytes: 0x00424541303101, then an exact of 2041 wildcard bytes, followed by 0x004E535230, then either 0x32 or 33 followed by 0x01

Byte sequences

Min Frag Length
Absolute from BOF
Offset
32768
Max offset
4096
Byte Sequence
00424541303101{2041}004E535230(32|33)01
Endianness
None

Changelog

  • Updated in V115

    Release date
    15 November 2023

    UDF Disc Image: Max-offset modified for BOF signature to allow for more exact signature identification. Submitted by Digital Preservation Department, The National Archives (UK).

  • Added in V108

    Release date
    5 September 2022

    UDF Disc Image: Signature researched and samples provided by The Church of Jesus Christ of Latter-day Saints.

    UDF Disc Image: Full entry added. Submitted by The Church of Jesus Christ of Latter-day Saints.