it-321 HW&SW Installation

Monday, February 19, 2007

DVD Drives

DVD drives

DVD drives come in a variety of speeds and options. The original drive (1x) transferred data at 1.35MB per second. By doubling the spindle speed (RPMs) for 2x drives, the transfer rate increased to 2.7MB/sec and has been increasing ever since. Each DVD x speed is equivalent to nine CD x's because DVD 1x is 1.35MB and CD-ROM 1x is only 150KB.
Most DVD drives can play DVD movies (DVD Video) and music CDs as well as read DVD-ROMs and CD-ROMs. Other drives may also support all, or some combination of, DVD-R, DVD-RW, CD-R or CD-RW media.
Drives and media that use the dash or minus sign (DVD-R, DVD-RW) are endorsed by the DVD Forum. A competing technology uses a plus sign (DVD+R, DVD+RW). Many DVD drives support both formats. See CD-ROM drives, DVD+R/RW drive, DVD-RAM and DVD.

0 Comments:

Post a Comment

<< Home