Rock Ridge

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Optical disc authoring

Optical disc Optical disc image Recorder hardware Authoring software Recording technologies Recording modes Packet writing
Optical media types
Laserdisc Compact Disc/CD-ROM: CD-R, CD-RW DVD: DVD-R, DVD-R DL, DVD+R, DVD+R DL, DVD-RW, DVD+RW, DVD+RW DL, DVD-RAM Blu-ray Disc: BD-R, BD-RE HD DVD: HD DVD-R
Standards
Rainbow Books File systems ISO 9660 Joliet Rock Ridge Amiga extensions to Rock Ridge El Torito Apple ISO9660 Extensions Universal Disk Format Mount Rainier

The Rock Ridge Interchange Protocol (RRIP, IEEE P1282) is an extension to the ISO 9660 volume format which adds POSIX file system semantics.

The extension adds support for storing Unix-specific file information on ISO 9660 CD-ROMs. The availability of this information allows for better integration with a local Unix filesystem when a mount operation is performed (also see Mount point).

These extensions are, briefly:

Longer file names (up to 255 characters)
Fewer restrictions on characters allowed in filenames
UNIX-style file modes, user ids and group ids
Symbolic links
Deeper directory hierarchy

[edit] Amiga Extensions on Rock Ridge

ISOAmiga Rock Ridge specific extensions support the additional Amiga-bits for files. There is support for attribute "P" that stands for "pure" bit (indicating re-entrant command) and attribute "S" for script bit (indicating batch file). This includes the protection flags plus an optional comment field. These extensions were introduced by Angela Schmidt with the help of Andrew Young the primary author of the Rock Ridge Interchange Protocol and System Use Sharing Protocol. The Amiga extensions are recognized by Amiga program MasterISO, and should also be recognized by MakeCD and Frying Pan, but the support by latter two programs is uncredited. Amiga filesystems supporting the extensions are AmiCDFS, AsimCDFS and CacheCDFS. Users who want to access comments and protection bits of their Amiga files present on CD's could simply mount some new logical units associated to the same physical unit, but using Amiga CacheCDFS as filesystem.