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Chapter 7 Storage - PowerPoint PPT Presentation


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Chapter 7 Storage. Memory Versus Storage. Contents of storage retained when power is off. Screen display and contents of most RAM (memory) erased when power is off. Next. How does volatility compare?. p. 7. 4 Fig. 7-2. What is capacity ?.

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memory versus storage
Memory Versus Storage

Contents of storage retained when power is off

Screen display and contents of most RAM (memory) erased when power is off

Next

How does volatility compare?

p. 7. 4 Fig. 7-2

memory versus storage1
What is capacity?

Numberof bytes (characters) storage medium can hold

Memory Versus Storage

Storage Term

Number of bytes

Abbreviation

Kilobyte

KB

1 thousand

Megabyte

MB

1 million

1 billion

Gigabyte

GB

Terabyte

1 trillion

TB

Petabyte

PB

1 quadrillion

Next

p. 7. 5 Fig. 7-3

hard disks
What is a head crash?

Occurs when read/write head touches platter surface

Spinning creates cushion of air that floats read/write head above platter

Hard Disks

gap is half the diameter of a dust particle

clearance between head and platter is approximately two millionths of an inch

hair

read/write head

dust

smoke

gap

Next

platter

p. 7. 12 Fig. 7-15

tapes
What is tape?

Magnetically coated ribbon of plastic capable of storing large amounts of data and information at a low cost

Primarily used for backup

Tapes

Next

Click to view Web Link

then click Tapes

p. 7. 26 Fig. 7-32

miniature mobile storage media
What is miniature mobile storage media?

Handheld devices use to augment internal storage

Miniature Mobile Storage Media

CompactFlash

40 MB

Cartridge

Digital cameras, notebook computers

Memory Stick

2 to 256 MB

Memory Card

Digital cameras, handheld computers, notebook computers, printers, cellular telephones

Microdrive

1 GB

Memory Card

Digital cameras, handheld computers, music players, video cameras

SmartMedia

2 to 128 MB

Memory Card

Digital cameras, handheld computers, photo printers, cellular telephones

Next

Click to view video

p. 7. 28 Fig. 7-37