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Universal Disk Format
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Universal Disk Format (UDF) is a newer file system for CD and DVDdeveloped and managed by the Optical Storage Technology Association as the successor to the ISO 9660 standard. UDF overcomes limitations of ISO 9660 and redirectors such as CDFS. UDF is used to ensure compatibility across platforms, as well as among various CD and DVD applications. UDF is required for DVDs, and is used by DVD to contain MPEG audio/video streams, UDF is ... used by CD-R and CD-RW in a process called packet writing that makes CD writing more efficient in terms of the time and disk space required.
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The Universal Disk Format (UDF) is a newer file system developed for optical media by the Optical Storage Technology Association (OSTA). UDF is a portable format that is recognized by several operating systems. UDF is replacing ISO 9660 as the new standard, especially with read/write media.
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With DVD+RW disks and the UDF (Universal Disk Format) it is possible to create an AIPS drive that uses a DVD in the same way as a regular hard drive, with the benefits that it can be removed and shared. There are some limitations... in that DVD+RW drives are at least 5 times slower than a typical hard drive, and they are rated at only 1000 writes. This means that active data reduction using a DVD+RW drive would be impractiably slow and eventually lead to corruption of data. Copying data over, and deleting unwanted files, should not pose a problem. To increase lifetime, UDF disks can be mounted read-only when the intention is only to read them.
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The Universal Disk Format (UDF) is new for Windows 2000. UDF is a file system defined by the Optical Storage Technology Association (OSTA). UDF is compliant with the ISO 13346 standard and is the successor to the CD-ROM file system (CDFS or ISO 9660).
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While the UDF specification has never been explicit about it, all UDF revisions since 1.5 actually describe three different variations of the format. For lack of an official name from OSTA they are called flavors here.
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Universal Disk Format