O'Reilly logo

Essential Guide to Computer Data Storage: From Floppy to DVD, The by Andrei Khurshudov

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

DVD

Introduction

DVD initially stood for Digital Video Disk but now stands for Digital Versatile Disc. Like a CD, DVD is an optical storage system for read-only, recordable, and rewritable applications. But, being similar to a CD in many ways, DVD is considered to be a CD future replacement.

The main differences between the CD and DVD are summarized in Table 4-7 and also in Figure 4-17.

Figure 4-17. Comparison of the main features of the CD and DVD discs.

Table 4-7. DVD versus CD-ROM
FeatureDVDCD-ROM
Substrate diameter/thickness (mm)120/1.2120/1.2
Sides1 or 21
Layers per side1 or 21
Capacity (GB)4.7, 8.54, 9.4, or 17~ 0.7
Track pitch (micrometers)

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required