It gets even stranger: in dmesg I do have the kernel recognizing the CD-Drive, saying: Attached SCSI CD-ROM sr0

It seems that the kernel finds the CD-drive but doesn't add it to the /dev or it adds it there, but then there is a change in filesystems, and it doesn't gets carried on or IDK.

BTW, now I do have a full /dev tree, except for sr0...(just switched to the latest 2.0.17 remastersys).