3. Hardware - Data Storage: Computer Science CIE IGCSE

DVDs have the potential for Dual Layering

• True

• False

What are DVD and Blu-ray layers joined with?

• Transparent polycarbonate spacers

• Very thin reflective layers

• Indium tin oxide

• Glass Substrate

How much more data can Blu-Ray store than DVD?

• Up to 5 times more

• double

• Triple

• Up to 12 times more

Automatically comes with a secure encryption system, helping prevent copywrite and hacking

• Blu-Ray

• CD

• DVD

What is Blu-Ray track pitch?

• 0.3 µm

• 1.2 µm

• 0.74 µm

What is DVD track pitch?

• 0.3 µm

• 1.2 µm

• 0.74 µm

What is possible on a Blu-Ray Disk?

• Change the read/write head direction

• Record HD TV

• Skip quickly to any part of the disk

• Embed defragmentation software

• Create playlists of recorded movies and TV

What is possible on a Blu-Ray Disk?

• Use it as RAM

• Edit/re-roder programs

• Automatically search for empty disk space to avoid over-recording

• Access websites

• Download subtitles

Can be used as backup

• CD

• DVD

• Blu-ray

How many layers can Blu-Ray have? (MAX)

• 1

• 2

• 3

• 4