LaCie d2 DVD±RW DriveUser Manual page 22Helpful Technical Information4. Helpful Technical InformationWhen writing DVD±R/RW and CD-R/RW discs,you will have the option to assign the disc a particularfile format (the way in which a computer names and or-ganizes files for storage and to manage data exchange).There are essentially three file system formats to be con-cerned with when using a LaCie DVD/CD Drive:❖ Universal Disk Format (UDF)❖ ISO 9660❖ Mac OS Extended (also known as HFS+)UDF - This specification, developed by OpticalStorage Technologies Association, is the predominantfile system that allows compatibility across various Blu-ray, DVD and CD applications, hardware platforms andcomputer operating systems.ISO 9660 - This is the standard file system whichallows media to be read on a Mac, PC or other ma-jor computer platform. Published by the InternationalOrganization of Standardization, this standard definesa file system for DVD-ROM and CDs. It supportsMicrosoft Windows, Mac OS and operating systemsthat follow the Unix specification, but doesn’t supportcustom features of Mac file systems such as long filenames or icon options. Microsoft created an extensionto the format, called Joliet, which allows for Unicodefile character names and file names up to 64 charactersin length (twice as many as the ISO 9660 Level 2 and3 specifications).Mac OS Extended - Also known as HFS+, this isthe file system used by Macintosh. If you will be usingyour disc only on Macs, this is the preferred file format.Hybrid discs (Mac & PC) - Mac users can alsochoose to create hybrid discs which contain two par-titions: one to be viewed by Mac users, one by Win-dows users. Toast 7 Titanium does allow this file systemchoice.4.1. File System Formats