UDF is the 'new' CD/DVD File System and it is already used in a number of situations.
There also have already been some major changes, so can you encounter UDF 1.02, UDF 1.5 and UDF 2.01
- DVD-ROM discs should always contain a UDF File-System, preferably UDF 1.02
- Packet Written Discs (CD-R and CD-RW), e.g. by Roxio Direct CD or Nero InCD use UDF 1.5
UDF 1.5 contains mechanisms to be able to append files and to be able to deal with defects on host side.
- Mount Rainier discs should contain UDF 1.02 again because the drive takes care of defect management.
UDF 1.02 is supported by Windows 98 or higher if the media is closed and contains a TOC.
It is preferred over Joliet and ISO9660 if found.