Storage Devices

Question 1

Hard Disk Drive (HDD)

Answer 1

A read/write head moves back and forth as the disk spins to locate or add new data.

Advantages
- Large Storage Capacity
- Cheaper per Megabyte/ Gigabyte
- Stored items remain when computer is off

Disadvantages
- Moving parts and disks are easily broken
- Can be affected by dirt/dust
- Being replaced by superior SSDs

Question 2

Blu-ray (High definition storage media)

Answer 2

Blu-ray is an optical disc and uses blue lasers which burn small pits into the surface which can then be read as data.

Advantages
- Larger capacity than DVDs
- Better picture and sound quality
- Fast for the storage and retrieval of data

Disadvantages
- Requires a dedicated player
- More expensive than DVDs
- Easily scratchable, broken or damaged

Question 3

Blank compact discs:
CD-R
CD-RW
CD-ROM
DVD

Answer 3

CD-R: Compact Disc Recordable
CD-RW: Compact Disc ReWritable
CD-ROM: Compact Disc Read Only Memory
DVD: Digital Versatile Disc

Question 4

Blank compact discs:
CD-R
CD-RW
CD-ROM
DVD

Answer 4

CD-R: Compact Disc Recordable
CD-RW: Compact Disc ReWritable
CD-ROM: Compact Disc Read Only Memory
DVD: Digital Versatile Disc