Gusti is correct. CD-ROMs are read-only (created using a special pressing machine), and therefore cannot be erased with a standard CD-R or CD-RW drive. CD-Rs are write-once media, and therefore I do not believe any standard CD-R or CD-RW drive can erase any section of the media that has already accepted data. Feel free to correct me if you feel I am mistaken.
Has anyone had any luck using Eraser with CD-RWs, DVD-RWs, DVD+RWs, or DVD+RAMs?
I doubt it would have any chance of working, as I dont believe it was designed for this... but I thought it would be interesting to hear the results if anyone has tried it!
I have a hunch that there will be a future need for this functionality... especially for the rewritable DVDs with their large capacity. I could also see a similar need for USB Flash Memory drives and smart media cards such as Compact Flash, SecureDigital, and Sony Memory Sticks.