![]() The rest begins with a volume descriptor set (a header block which describes the subsequent layout) and then the path tables, directories and files on the disc. The first 16 sectors of the file system are empty and reserved for other uses. Subsequent amendments to the standard were published in 20. ![]() ![]() High Sierra was adopted in December 1986 (with changes) as an international standard by Ecma International as ECMA-119 and submitted for fast tracking to the ISO, where it was eventually accepted as ISO 9660:1988. To facilitate cross platform compatibility, it defined a minimal set of common file attributes (directory or ordinary file and time of recording) and name attributes (name, extension, and version), and used a separate system use area where future optional extensions for each file may be specified. ISO 9660 traces its roots to the High Sierra Format, which arranged file information in a dense, sequential layout to minimize nonsequential access by using a hierarchical (eight levels of directories deep) tree file system arrangement, similar to UNIX and FAT. Since the specification is available for anybody to purchase, implementations have been written for many operating systems. The file system is an international standard available from the International Organization for Standardization (ISO). ISO 9660 (also known as ECMA-119) is a file system for optical disc media. ![]()
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