Information AboutIso 9660 |
| CATEGORIES ABOUT ISO 9660 | |
| disk file systems | |
| iso standards | |
| #09660 | |
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ISO 9660, a standard published by the International Organization For Standardization (ISO), defines a File System for CD-ROM media. It aims at supporting different computer Operating System s such as Unix , Windows and Mac OS , so that data may be exchanged. An extension to ISO 9660, the Joliet format, adds support to allow longer file names and non-ASCII character sets. DVDs may also use the ISO 9660 file system. However, the UDF file system is more appropriate on DVDs as it has better support for the larger media and is better suited for modern operating system needs. HISTORY A CD-ROM may be mastered with any kind of information on it. Sun Microsystems , for example, uses the Berkeley UNIX UFS file systems on many CD-ROMs. Silicon Graphics ' IRIX installation media uses EFS . Mac OS uses HFS . This restricts them to the producer's operating environment, which, while beneficial in the case of platform-specific software distributions, is not appropriate for widely distributing content. Hence, the need for one optical format that would play on a variety of equipment arose. Before there was a standard on this matter some were using the High Sierra format on CD-ROM, which arranged file information in a dense, sequential layout to minimise nonsequential access.The High Sierra file system format uses a hierarchical (eight levels of directories deep) tree file system arrangement, similar to UNIX and MS-DOS. High Sierra has a minimal set of file attributes (directory or ordinary file and time of recording) and name attributes (name, extension, and version). The designers realised they could never get people to agree on a unified definition of file attributes, so the minimum common information was encoded, and a place for future optional extensions (system use area) was defined for each file. |
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