To distribute these self-booting images online, the community standardized the file format. Originally created by the disc-authoring software Padus DiscJuggler , CDI files can replicate the complex multi-session layouts required to trigger the MIL-CD exploit on a physical Dreamcast console. The Challenge of "Extra Quality" Dreamcast Rips
A common piece of advice is to burn discs at the absolute slowest speed possible (e.g., 1x or 2x). However, modern CD-R media and modern optical burners are engineered to be written to at higher speeds (typically 8x to 16x). Forcing a modern burner to write at 1x can actually introduce write errors. Burn at the lowest native speed supported by your media and hardware combo. dreamcast cdi internet archive extra quality
Trouble burning larger games, need some suggestions : r/dreamcast However, modern CD-R media and modern optical burners