(I ask the question again, one suggested SuperUser, but I was right, it has been closed instantly.)
There are well-known sectors and modes for CD-ROM medias:
- for storing music in a digital form, with 2 channels at 44.1 Khz
- Mode 1 Form 1, Mode 2 Form 1:
- for storing data, content that requires error correction
- Mode 2 Form 2
- for storing content were errors are permissible, e.g. video
But there are also less-known sectors and modes for CD-ROM medias:
- Mode 0:
- they are filled with zeroes, AFAICT, never seen in a burning software
- Mode 1 Form 2:
- indeed they are valid by the standard but why such specialization ?
- Mode 2 Formless:
- another special type for which I miss purpose of
- Mixed Mode (for Mode 2, applies to tracks):
- the ability to mix Mode 2 sectors in a track, for special content apparently
Of all the retro hardware that used CD-ROM, I remember AKAI CD-ROMs for SCSI audio samplers being one of these, these weren't directly readable in a PC, only using special software.
Do you have any other example of hardware that used non-standard CD-ROM modes and sectors ?
(I hope the question is correct now, let me know how I could improve it otherwise)