This industry standard media format was originally designed to specify the volume and file structures of compact-disk read-only memory (CD-ROM) optical disks, and is a read-only media format.
The ISO 9660 format is used currently on CD and DVD read only media. i5/OS™ supports ISO 9660 media that is created using the primary volume descriptor (PVD). i5/OS does not support ISO 9660 extensions that use the supplementary volume descriptor (SVD).
In addition, there is some support for ISO 9660 extensions defined as the IEEE P1281 (System Use Sharing Protocol) and P1282 (Rock Ridge Interchange Protocol) specifications. These extensions are also known as Rock Ridge. i5/OS supports the Rock Ridge alternate name structures through the PVD. This support provides recognition and handling of mixed case and long file names, similar to a UNIX® system. Other structures defined by Rock Ridge are not supported by i5/OS. To enable support to read Rock Ridge alternate name structure (if it exists), enter CHGOPTA EXTMEDFMT(*YES) prior to importing the media. If the Rock Ridge alternate name structures do not exist, entering this command will have no effect.
