<Storage, Standard> (UDF) A CD-ROMfile SyStemStandard 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 MPEGaudio and videoStreamS. 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)