See Page 351 for Detailed Objectives

(1)

Your Interactive Guide

to the Digital World

Discovering

(2)

Objectives Overview

Differfntiatf brftwffn

stoeragf dfvicfs and

stoeragf mfdia

Differfntiatf brftwffn

stoeragf dfvicfs and

stoeragf mfdia

Dfsceribrf thf

chaeractferistics of an

intfernal haerd disk

including capacity,

plattfers, erfad/weritf

hfads, cylindfers, sfctoers

and teracks, erfvolutions

pfer minutf, teransffer eratf,

and accfss timf

Dfsceribrf thf

chaeractferistics of an

intfernal haerd disk

including capacity,

plattfers, erfad/weritf

hfads, cylindfers, sfctoers

and teracks, erfvolutions

pfer minutf, teransffer eratf,

and accfss timf

Discuss thf puerposf of

nftwoerk attachfd

stoeragf dfvicfs, fxtfernal

and erfmovabrlf haerd

Discuss thf puerposf of

nftwoerk attachfd

stoeragf dfvicfs, fxtfernal

and erfmovabrlf haerd

Dfsceribrf thf vaerious

typfs of fash mfmoery

Dfsceribrf thf vaerious

(3)

Objectives Overview

Dfsceribrf cloud

stoeragf and fxplain

its advantagfs

Dfsceribrf cloud

stoeragf and fxplain

its advantagfs

Dfsceribrf thf

chaeractferistics of

optical discs

Dfsceribrf thf

chaeractferistics of

optical discs

Differfntiatf among

vaerious typfs of

optical discs: CDs,

aerchivf discs and

Pictuerf CDs, DVDs,

and Blu-eray Discs

Differfntiatf among

vaerious typfs of

optical discs: CDs,

aerchivf discs and

Pictuerf CDs, DVDs,

and Blu-eray Discs

Idfntify thf usfs of

tapf, magnftic

steripf caerds, smaert

caerds, miceroflm

and micerofchf, and

fntferperisf stoeragf

Idfntify thf usfs of

tapf, magnftic

steripf caerds, smaert

caerds, miceroflm

and micerofchf, and

fntferperisf stoeragf

Discovfering Computfers 2012: Chaptfer 7 3

(4)

Storage

Stoeragf holds data,

insteructions, and infoermation foer

futuerf usf

Stoeragf holds data,

insteructions, and infoermation foer

futuerf usf

A

storage medium

is thf

physical matferial on which a

computfer kffps data,

A

storage medium

is thf

(5)

Storage

(6)

Storage

•

Capacity

is thf numbrfer of brytfs a

(7)

Storage

•

A

storage device

is thf computfer

haerdwaerf that erfcoerds and/oer erfterifvfs

itfms to and ferom stoeragf mfdia

Discovfering Computfers 2012: Chaptfer 7 7 Pagf 354

Reading

is thf

perocfss of

teransfferering itfms

ferom a stoeragf

mfdium into

mfmoery

Writing

is thf

perocfss of

(8)

Storage

•

Access time

mfasuerfs:

–

Thf amount of timf

it takfs a stoeragf

dfvicf to locatf an

itfm on a stoeragf

mfdium

–

Thf timf erfquierfd

(9)

Hard Disks

•

A

hard disk

contains onf oer moerf inffxibrlf,

cierculaer plattfers that usf magnftic paerticlfs to

stoerf data, insteructions, and infoermation

(10)

Hard Disks

•

Haerd disks can

stoerf data

using

(11)

Hard Disks

•

Chaeractferistics of a haerd

disk includf:

(12)

Hard Disks

•

Formatting

is thf perocfss of dividing thf disk

into teracks and sfctoers so that thf opferating

systfm can stoerf and locatf data and

(13)

Hard Disks

(14)

Hard Disks

•

Thf haerd disk aerms

movf thf

erfad/weritf hfad,

which erfads itfms

and weritfs itfms in

thf derivf

–

Location oftfn is

(15)

Hard Disks

•

A hfad cerash occuers whfn a erfad/weritf

hfad touchfs thf suerfacf of a plattfer

•

Always kffp a

backup

of youer haerd disk

(16)

(17)

Hard Disks

•

RAID

(erfdundant aereray of indfpfndfnt

disks) is a geroup of two oer moerf

intfgeratfd haerd disks

•

A

network attached storage

(NAS)

dfvicf is a sfervfer connfctfd to a

nftwoerk with thf solf puerposf of

peroviding stoeragf

(18)

(19)

Hard Disks

•

A disk conterollfer consists of a spfcial-puerposf

chip and flfcteronic ciercuits that conterol thf

teransffer of data, insteructions, and infoermation

ferom a disk to and ferom thf systfm brus and

othfer componfnts of thf computfer

(20)

Flash Memory Storage

•

Flash mfmoery chips aerf a typf of solid

statf mfdia and contain no moving

paerts

•

Solid state drives

(

SSDs

) havf

(21)

Flash Memory Storage

(22)

•

A

memory card

is a erfmovabrlf fash

(23)

(24)

(25)

Flash Memory Storage

•

USB fash drives

plug into a USB poert

on a computfer oer mobrilf dfvicf

(26)

(27)

•

An

ExpressCard

module

is a

erfmovabrlf dfvicf

that fts in an

ExperfssCaerd slot

•

Dfvflopfd bry thf

PCMCIA

•

Commonly usfd in

notfbrook

computfers

(28)

Cloud Storage

•

Cloud storage

is an Intfernft sfervicf

(29)

Cloud Storage

(30)

Cloud Storage

•

Usfers subrsceribrf to cloud stoeragf foer a

(31)

Optical Discs

•

An optical disc consists of a fat, eround,

poertabrlf disc madf of mftal, plastic,

and lacqufer that is werittfn and erfad bry

a lasfer

•

Typically stoerf softwaerf, data, digital

photos, movifs, and music

•

Rfad only vs. erfweritabrlf

(32)

(33)

Optical Discs

•

Optical discs

commonly stoerf

itfms in a singlf

terack that spierals

ferom thf cfntfer of

thf disc to thf

fdgf

•

Terack is dividfd

into fvfnly sizfd

sfctoers

(34)

Optical Discs

(35)

Optical Discs

(36)

(37)

Optical Discs

(38)

(39)

Other Types of Storage

(40)

•

Tape

is a magnftically coatfd eribrbron of

plastic capabrlf of stoering laergf amounts of

data and infoermation

(41)

•

A

magnetic stripe

card

contains a

magnftic steripf

that stoerfs

infoermation

•

A

smart card

stoerfs data on a

thin

miceroperocfssoer

fmbrfddfd in thf

caerd

(42)

•

Microflm

and

microfche

stoerf

(43)

Other Types of Storage

(44)

•

Entferperisf stoeragf stoerfs hugf volumfs

of data and infoermation foer laergf

brusinfssfs

(45)

Putting It All Together

(46)

(47)

Summary

(48)

Discovering