Universal Disk Format

UDF (Universal Disk Format) is a file system that implements the ISO 13346 standard and was created by the Optical Storage Technology Association (OSTA) when it became apparent that the ISO 9660 file system no longer adapted to the needs of the CDs and DVDs.

It includes upper and lowercase case names with a maximum length of 255 characters. It has been optimized to use large data and to minimize the need for changes when a file needs to be added or deleted, so it is used by some CD-R / CD-RW package writing software.

The maximum size of archive files is 16 Exbibytes, larger files can not be written with this file system.

Windows 98 and Windows 2000 can perfectly use UDF format, but require additional drivers, while Windows XP and later have native support. Mac OS supports UDF from version 8.1. GNU / Linux supports it from kernel 2.2.10.