Unit 11 Optical Storage - College of Computer Science, Jazan

Unit 11 Optical Storage - College of Computer Science, Jazan
Unit 11 Optical Storage
1: CDs and DVDs
1. CD stands for compact disc and DVD stands for digital versatile disc.
2. DVDs can hold more information than CDs.
1. True
2. False – The dimensions of a CD and a DVD are 1.2mm thick and 12 mm in diameter.
3. True
4. False – A DVD can hold 4.7 gigabytes.
5. False – A DVD player or DVD drive is needed to read DVDs.
6. True
7. False – a DVD-Writer is compatible with old CD-ROMs.
2: Optical discs and drives
1. Optical discs store much more data than magnetic disks.
2. 17 GB.
3. A DVD burner is a computer drive that records data on DVDs. While, a DVD recorder refers to a
stand-alone unit, similar to a VCR.
4. Multi-format playback.
5. HD-DVD and Blu-ray.
6. Unlike DVDs, which use a red laser to read/write data, Blue-ray uses a blue violet laser.
Capacity and formats
Possible uses
650-700 MB
CD-ROM: to include a dictionary or game
Formats: CD-ROM, CD-R, CD-RW
CD-R: to duplicate music and data files
CD-RW: to backup important files
4.7GB – 17GB
DVD-ROM: encyclopedias, movies
Formats: DVD-ROM, DVD-R, DVD+R,
DVD-R: to backup information
DVD-RW: to backup data files and to record
Unit 11 Optical Storage
To record and play high-definition TV, audio and
computer data.
25 – 50 -100 GB
3: Language work: connector 2
Indicating addition
Making contrast
Explaining the results or effects
of something
In addition
As a result
1. Although
2. As a result
3. So
4. Because
5. And
6. Therefore
4: Choosing storage devices
1. Seagate hard drive
2. Panasonic portable DVD player
3. Seagate hard drive; Iomega portable hard drive; Toshiba USB flash drive
4. Iomega portable hard drive; LaCie DVD drive
5. Seagate hard drive; LaCie DVD drive
6. Sony Blu-ray disc drive
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