CGS 1000

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CGS 1000

• Introduction to Computers and Technology
• Fall 2006

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Topics

• Chapter 6
• Class Activity
• PPT 4 to PPT 65

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Topics Covered

• Chapter 6 Objectives
• Defined Storage, Storage Device
• Characteristics of hard disk

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Optical Discs
Push the button toslide out the tray.

• What are optical discs?

• Flat, round, portable metal discs made of metal,
  plastic, and lacquer
• Can be read only or read/write
• Most PCs include an optical disc drive

Insert the disc,label side up.
Push the same buttonto close the tray.
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Optical Discs

• How should you care for an optical disc?

Do not exposethe disc to excessiveheat or
sunlight
Do noteat, smoke, ordrink neara disc
Do not stack discs
Do not touchthe undersideof the disc
Do store thedisc in a jewelbox whennot in use
Do hold a discby its edges
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Optical Discs

• What is a CD-ROM?

• Cannot erase or modify contents
• Typically holds 650 MB to 1 GB
• Commonly used to distribute multimedia and
  complex software
• Compact disc read-only memory

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Optical Discs

• What is a Picture CD?

Step 1.Drop off film to be developed. Mark the
Picture CD box on the film-processing envelope.
Step 3.At home, print images from Picture CD on
your ink-jet photo printer.
Step 2.When you pick up prints and negatives, a
Picture CD contains digital images of each
photograph.
At a store, print images to Picture CD at kiosk.
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Optical Discs
Must haveCD recorderor CD-R drive

• What are CD-Rs and CD-RWs?

CD-R (compact disc-recordable) disc you can write
on once
Cannot erasediscs contents
CD-RW (compact disc-rewritable) erasable disc you
can write onmultiple times
Must haveCD-RW softwareand CD-RW drive
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Optical Discs

• What is a DVD-ROM (digital versatile disc-ROM or
  digital video disc-ROM)?

• Must have DVD-ROM drive or DVD player to read
  DVD-ROM
• Stores databases, music, complex software, and
  movies
• Blu-ray discs have storage capacity of up to 27
  GB
• HD-DVD discs have storage capacity of up to 45 GB

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Optical Discs

• How does a DVD-ROM store data?

• Two layers of pits are used, lower layer is
  semitransparent so laser can read through
• Some are double-sided
• Many types of recordable and rewritable DVDs are
  available
• DVD-R and DVDR
• DVD-RW and DVDRW

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Tape

• What is tape?

• Magnetically coated plastic ribboncapable of
  storing large amountsof data at low cost
• Primarily used for backup

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Tape

• How is data stored on a tape?

• Sequential access
• Reads and writes data consecutively, like music
  tape
• Unlike direct access used on floppy disks, Zip
  disks, hard disks, CDs, and DVDs which can
  locate particular item immediately

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PC Cards

• What is a PC Card?

• Adds capabilities to computer
• Credit-card-sized device commonly used in
  notebook computers

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Miniature Mobile Storage Media

• What is miniature mobile storage media?

• Storage for small mobile devices

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Miniature Mobile Storage Media

• What is a USB Flash Drive?

• Plugs in a USB port on a computer or mobile
  device
• Storage capacities up to 4 GB
• Making the floppy disk obsolete

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Miniature Mobile Storage Media

• What is a smart card?

• Stores data on microprocessor embedded in small
  card
• Input, process, output, and storage capabilities

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Microfilm and Microfiche

• What are microfilm and microfiche?

Store microscopic images of documents on roll or
sheet of film
Images recorded using computer output microfilm
recorder
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Microfilm and Microfiche

• How do life expectancies of various media compare?

• Microfilm and microfiche have longest life of any
  storage media

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Putting It All Together

• What are recommended storage devices for home
  users?

• 160 GB hard disk
• Online storage
• CD or DVD drive
• Card reader/writer
• USB flash drive

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Putting It All Together

• What are recommended storage devices for small
  office/home office (SOHO) users?

• 250 GB hard disk
• Online storage
• CD or DVD drive
• External hard drive for backup
• USB flash drive

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Putting It All Together

• What are recommended storage devices for mobile
  users?

• 100 GB hard disk
• Online storage
• CD or DVD drive
• Card reader/writer
• Portable hard disk for backup
• USB flash drive, and/or 5 GB PC Card hard disk

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Putting It All Together

• What are recommended storage devices for power
  users?

• CD or DVD drive
• 500 GB hard disk
• Online storage
• Portable hard disk for backup
• USB flash drive

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Putting It All Together

• What are recommended storage devices for large
  business users?

• Desktop computer
• 250 GB hard disk
• CD or DVD drive
• Smart card reader
• Tape drive
• USB flash drive
• Server or Mainframe
• Network storage server
• 40 TB hard disk system
• CD-ROM or DVD-ROM server
• Microfilm or microfiche

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Summary of Storage
Recordable and rewritable DVDs
Internal hard disks
Tape
Portable hard disks
PC Cards
Floppy disks
Flash memory cards
Zip disks
USB Flash Drives
CD-ROMs
Recordable and rewritable CDs
Smart Cards
DVD-ROMs
Microfilm and microfiche
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Questions?