What are the black dots on the recording side of my CD-R?
The black dots likely indicate dust contamination on the recording surface. If dust is present on the CD-R before recording, the recording laser will not burn a proper mark into the recordable dye. This improperly-burned mark is seen as a black dot and will more than likely result in an uncorrectable error when reading. It is best to eliminate dust from the recording side with pressurized air. Don’t blow on it. You may get rid of the dust but you’ll have saliva spots on the disc.
