The same files are seen as HFS files when accessed from a Macintosh and as ISO-9660 files when accessed from other machines. Mkisofs can generate a true (or shared) HFS hybrid filesystem. It will generate a pure ISO-9660 filesystem unless the Joliet, HFS or UDF hybrid command line options are given. The file content in this case refers to the same data blocks on the media. If Joliet, HFS or UDF hybrid command line options are specified, mkisofs will create additional separate filesystem meta data for Joliet, HFS or UDF. This is used to further describe the files in the ISO-9660 filesystem to a UNIX host, and provides information such as longer filenames, uid/gid, posix permissions, symbolic links, hard links, block and character devices. Mkisofs is capable of generating the "System Use Sharing Protocol records (SUSP) specified by the "Rock Ridge Interchange Protocol. If a HFS hybrid is created, the maximum file size for files in the HFS hybrid is 2 GB in any case. If you like to have files larger than 2 GB, you need to specify -iso-level 3 or above. The maximum size of a single file is 8 TB (single files in UDF are currently limited to aprox. ISO-9660/JOLIET/UDF filesystems are limited to a maximum size of 8 TB. Mkisofs is effectively a pre-mastering program to generate an ISO-9660/JOLIET/HFS/UDF hybrid filesystem.
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