Question: What are CD-RW drives? Something to do with CD burners?
Answer: CD-RW drives are CD burners, but they can also write to the new CD-RW media. CD-RW discs are special CD-Rs. They are more expensive but can be rewritten up to 1000 times -- but you do need a CD-RW drive to use them. CD-RWs cannot be read by drives built prior to 1997. If your drive was built later, it may possibly be able to read CD-RWs.
The reflectivity of pressed CDs is about 70%. The value for CD-Rs is about 65%. For CD-RWs, the reflectivity is only 15%. This should make it clear why CD-RWs cannot be read on the older conventional drives.
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