ISO9660 - File and directory names

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The ISO level selected in GEAR Pro will determine how file and directory names are written to a CD, and how many.

There are 3 levels in the ISO9660 file system. Each level has its own rules regarding file and directory name lengths and the use of mixed case characters in the name.

Contents


ISO-9660 Level 1

[↑]

  • File and directory names can be 8 characters long
  • File and directory names can have a 3 character extension
  • All characters must be upper case and the only characters allowed are A-Z, 0-9, '.', and '_'.
  • Files may also have a version number, which is separated from the file name by a semicolon.
    Example:
    README.TXT;1

Truncated Files/Directories

When files and directories with long names are recorded from a Windows PC to blank CD/DVD media and viewed on a UNIX or Linux system, the file and directory names have been truncated

Cause:
GEAR PRO for Windows will create a CD/DVD with only the ISO9660 file system on it by default.

There are several levels of ISO9660. Each level has its own rules regarding file and directory name lengths and the use of mixed case characters in the name (see above)

GEAR will truncate the long file and directory names to comply with the ISO9660 level chosen.

UNIX systems use the Rockridge extensions to store long file names on a CD.

Solution:

  • Select "Do Not Translate Names" in the Non ISO name handling pull down window when creating a ISO or ISO/UDF project

GEAR PRO Mastering Edition allows you to add the Rockridge information to files and directories when creating ISO and ISO/UDF projects

  • Select the [√] Add UNIX Rock Ridge information and select the permission you wish to assign the files/folders

NOTE: When viewing the disc on a UNIX system, mount the CD as a Rockridge CD, and not as an ISO or High Sierra File System (HSFS) CD


ISO-9660 Level 2

[↑]

  • File names can be 30 characters long (includes the extension)
  • Directory names can be 31 characters long
  • All characters must be upper case and the only characters allowed are A-Z, 0-9, '.', and '_'
  • Files may also have a version number, which is separated from the file name by a semicolon.

ISO-9660 Level 3

[↑]

  • File and directory names can be up to 31 characters long and must be in all upper case characters
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