Format of virtual optical images

For virtual optical, images are available in International Standards Organization (ISO) 9660 format and Universal disk format (UDF).

ISO 9660

If a virtual image is in ISO 9660 format, it is read-only. Also, you cannot span virtual images that are in ISO 9660 format.

UDF

The virtual image is in UDF if you do one of the following:

Create a virtual image by specifying FROMFILE(*NEW) on the Add Image Catalog Entry (ADDIMGCLGE) command.
Create a virtual image from a DVD.
Create a virtual image from CD-RW media which is in UDF.

Typically, you specify FROMFILE(*NEW) when you plan to save to a virtual image or plan to use a virtual image to distribute software. You can also span virtual images that are in UDF.

If you want to create actual media from a virtual image in UDF, you can send the virtual image to a PC or you can use the Duplicate Optical (DUPOPT) command to copy the virtual image directly to a DVD-RAM drive on your server.