Most optical drives today are combo CD/DVD drives that support DVDs and all the CD formats: CD audio, CD-ROM, CD-R and CD-RW. The speeds of the drives are rated by their CD-ROM and DVD transfer rates.

Features: Read Speed: 24x Max; DVD-ROM: 8x Max; DVD-ROM(DL): 6x Max, Write Speed: 24x CD-R, 8x CD-RW, DVD±R: 8X Max; DVD±R DL: 4X Max; DVD-R±9: 2.4x Max, Rewrite Speed: DVD+RW: 4X Max ...

CD-ROM - read only, the data is written to them ... the user can write data to the DVD once or fill it over time using multi-session. DVD-RW - meaning DVD-ReWritable, the DVD can be written ...

A direct access storage device that is written and read by light. The most common types are CD, DVD and Blu-ray. As removable media, optical discs superseded the earlier magnetic disk cartridges ...