CD-ROM, CD-RW, and DVD Drives

Optical drives fall into two major categories:

  • Those based on CD technology, including CD-ROM, CD-R (recordable CD), and CD-RW (rewritable CD)

  • Those based on DVD technology, including DVD-ROM, DVD-RAM, DVD-R/RW, DVD+R/RW and DVD±R/RW


You should understand both read-only and recordable/rewritable CD and DVD standards to be prepared for the A+ Certification Exam and for your day-to-day work because these drives are found in virtually all recent computers.

How CD-ROM and DVD Drives Store Data

The data are stored in a continuous spiral of indentations called pits and lands on the nonlabel side of the media from the middle ...

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