: Most .cdi files in these archives are "self-booting," meaning they don't require a separate "Utopia Boot CD" to start on a standard Dreamcast console.
stands for DiscJuggler Image . DiscJuggler was a professional disc burning software popular in the late 1990s and early 2000s.
This guide walks you through safely and efficiently examining a Sega Dreamcast CDI archive (a collection of disc image files in the CDI format). It covers tools to inspect contents, verify integrity, extract files, and run images for research or preservation. Assume a single archive folder containing .cdi files and related metadata.
Archives featuring arcade-to-Dreamcast ports like Metal Slug 6 or Dolphin Blue converted into CDI format. How to Use These Archives SEGA Dreamcast SelfBoot CDI Collection - Internet Archive