Universal Disk Format

storage, standard (UDF) A CD-ROM file system standard

that is required for DVD ROMs. UDF is the OSTA's

replacement for the ISO 9660 file system used on CD-ROMs,

but will be mostly used on DVD. DVD multimedia disks use

UDF to contain MPEG audio and video streams.

To read DVDs you need a DVD drive, the kernel driver for the

drive, MPEG video support, and a UDF driver. DVDs containing

both UDF filesystems and ISO 9660 filesystems can be read

without UDF support.

UDF can also be used by CD-R and CD-RW recorders in

packet writing mode.

(1999-09-01)