UDF is a very expanded version of ISO 9660 - its actually ISO 13346
It allows for very long filenames and very large INDIVIDUAL files (do not confuse with compilation size)
ALL Video and Music files are burned into a DVD with UDF format
Linux can read them no prob (later vers.)
http://www.disctronics.co.uk/technology/dvdintro/dvd_filesys.htm
http://en.wikipedia.org/wiki/Universal_Disk_Format
Quote:
The most common File System on all CDs and DVDs is the ISO9660 File System.
It is however also the oldest and has some major disadvantages such as short file names (8.3) and a directory structure which can only be 8 levels deep. Because of these limitations it is almost always accompanied by one or more File Systems that don't have these limitations. However you need it if you want to see the content of the CD in an old DOS mode or an older Mac or Sun system.
Some mastering application sin against these limitations and allow to master ISO9660 with long file names and more directories deep. This shouldn't be a problem as of Windows 95 OSR2 but these CDs might cause problems in other systems.
Of course IsoBuster has no problems with these CDs as well.
Unquote
http://www.smart-projects.net/isobuster/help/noframes/hs160.htm
Edit:
and heres another nice read on the subject:
http://aumha.org/win5/a/xpcd.php