What is joliet extension support

The specification only allows filenames to be up to 64 Unicode characters in length. However, the documentation for genisoimage states filenames up to characters in length do not appear to cause problems.

Many current PC operating systems are able to read Joliet-formatted media, thus allowing exchange of files between those operating systems even if non-Roman characters are involved such as Arabic, Japanese or Cyrillic , which was formerly not possible with plain ISO formatted media. Operating systems which can read Joliet media include:.

Microsoft recommends the use of the Joliet extension for developers targeting Windows. A "Secondary" volume descriptor with type 2 contains the same information as the Primary one sector 16 offset 40 bytes , but in UCS-2 in sector 17, offset 40 bytes. As a result of this, the volume name is limited to 16 characters.

The disktype program prints the Joliet Unicode volume name, if present. Chat WhatsApp. Optical discs General. Optical disc Optical disc drive Optical disc authoring Authoring software Recording technologies Recording modes Packet writing. Optical media types. See also. History of optical storage media High definition optical disc format war. Microsoft Knowledge Base. MSKB Retrieved November 1, Windows NT 4. Retrieved May This breaks the Joliet specification, but appears to work.

Use with caution. Revision 1. Mac OS X Version OpenSolaris Man Page Set. SunOS 5. Section 3. From Wikipedia, the free encyclopedia. The Joliet format is a derivative of ISO This format writes the Joliet file system index to the disc image in addition to the ISO file system index.

UDF is a portable format that is recognized by several operating systems. Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services.

Privacy policy. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. The ISO specification defines three levels of the format: Level 1 defines file names to use the 8. Level 2 permits longer file names, as found on DOS 6. Level 3 allows interleaved data and audio files to improve retrieval playback performance.

This level also removes the 2GB file limit. The Joliet index provides the following improvements to the file system index: Recognizes long file names up to 32 characters. Distinguishes between upper and lower case letters in the file names. Supports Unicode characters in the filename.