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The web site of the association provides the full digital specification books of each revision of the Universal Disc Format (UDF) starting at 1.02, as well as other whitepapers and information pages related to optical data storage. Besides the UDF specifications, differences between the revisions of the specifications can be obtained.
Optical-disc images are uncompressed and do not use a particular container format; they are a sector-by-sector copy of the data on an optical disc, stored inside a binary file. Other than ISO 9660 media, an ISO image might also contain a UDF (ISO/IEC 13346) file system (commonly used by DVDs and Blu-ray Discs ), including the data in its files ...
After the release of the first version of UDF, the DVD Consortium adopted it as the official file system for DVD-Video and DVD-Audio. [5] UDF shares the basic volume descriptor format with ISO 9660. A "UDF Bridge" format is defined since 1.50 so that a disc can also contain a ISO 9660 file system making references to files on the UDF part. [6]
The supported UDF versions for usage as a live file system are UDF 1.50, UDF 2.00, UDF 2.01, UDF 2.50 for CD-R, CD-RW, DVD±R, DVD±RW and BD-RE, and UDF 2.60 for BD-R. [ 3 ] [ a ] However even if UDF 1.50 and above can be read, only the plain UDF build may be supported and not necessarily either the VAT or Spared UDF builds required for full ...
Universal Disk Format, an operating-system-independent file system commonly used on DVD and other digital media Uniqueness Database File , a Windows XP Professional configuration text file User-defined function , a function provided by the user of a program or environment
The system area, the first 32,768 data bytes of the disc (16 sectors of 2,048 bytes each), is unused by ISO 9660 and therefore available for other uses. [17] While it is suggested that they are reserved for use by bootable media , [ 18 ] a CD-ROM may contain an alternative file system descriptor in this area, and it is often used by hybrid CDs ...
In computing, an optical disc drive (ODD) is a disc drive that uses laser light or electromagnetic waves within or near the visible light spectrum as part of the process of reading or writing data to or from optical discs.
The CD-ROM format was developed by Sony and Philips, introduced in 1984, as an extension of Compact Disc Digital Audio and adapted to hold any form of digital data. The same year, Sony demonstrated a LaserDisc data storage format, with a larger data capacity of 3.28 GB. [20]