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MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

A Member Of

COM1012

MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

1

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MO1 MO2

Describe basic computer hardware, software, input,

output, communication and network devices.

To apply the suitable office application to

fulfill given task.

A Member Of

COM1012

Learning Outcomes

2

Define what is storage,

storage medium, storagedevice, access time andcapacity

Describe the various

types of flash memorystorage

Describe cloud storage

and explain itsadvantages

Describe the hard diskand explain the

characteristics of a harddisk .

Differentiate amongvarious types of optical

discs

Identify the uses of tape,magnetic stripe cards,smart cards, microfilm

and microfiche, andenterprise storage

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Storage

Storage holds data,instructions, and

information for future

use

A storage medium isthe physical material on

which a computerkeeps data,

instructions, andinformation

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COM1012

Storage

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Storage

Capacity is the number of bytes a storage medium

can hold

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Storage A storage deviceis the computer hardware that

records and/or retrieves items to and from

storage media

6

Reading is the processof transferring itemsfrom a storage mediuminto memory

Writing is the process oftransferring items frommemory to a storagemedium

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COM1012

Hard Disks A hard disk is a high capacity storage that contains one or

more inflexible, circular platters that use magnetic particles to

store data, instructions, and information

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Hard Disks Characteristics of a hard diskinclude:

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Capacity Platters Read/WriteHeads

CylindersSectors and

TracksRevolutionsper Minute

Transfer Rate Access Time

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Hard Disks

The hard disk arms

move the read/write

head, which reads items

and writes items in the

drive

Location often is

referred to by itscylinder

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COM1012

Hard Disks

A head crash occurs when a read/write head

touches the surface of a platter

Always keep a backup of your hard disk10

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Hard Disks RAID (redundant array of independent disks) is a

group of two or more integrated hard disks

A network attached storage (NAS) device is aserver connected to a network with the sole

purpose of providing storage

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Hard DisksAn external hard disk is a separate free-standinghard disk that connects to your computer with a

cable or wirelessly

A removable hard disk is a hard disk that youinsert and remove from a drive

Internal and external hard disks are available inminiature sizes (pocket hard drive)

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Flash Memory Storage Flash memory chips are a type of solid state

media and contain no moving parts

Solid state drives (SSDs) have several advantagesover magnetic hard disks:

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Faster access

time

Faster transfer

rates

Generate lessheat and

consume lesspower

Last longer

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output, communication and network devices.

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fulfill given task.

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COM1012

Flash Memory Storage

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Flash Memory Storage A memory cardis a removable flash memorydevice that you insert and remove from a slot in a

computer, mobile device, or card reader/writer

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CompactFlash(CF)

Secure Digital

(SD)

Secure Digital

High Capacity

(SDHC)microSD

microSDHCxD Picture

CardMemory Stick

Memory Stick

Micro (M2)

O O2

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COM1012

Flash Memory Storage

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MO1 MO2

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Flash Memory Storage

USB flash drivesplug into a USB port on a

computer or mobile device17

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Flash Memory Storage

An ExpressCard module

is a removable device

that fits in an

ExpressCard slot

Commonly used in

notebook computers

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output, communication and network devices.

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Cloud Storage

Cloud storageis an Internet service that provides

storage to computer users

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output, communication and network devices.

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Cloud Storage

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output, communication and network devices.

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Cloud Storage

Users subscribe to cloud storage for a variety of

reasons:

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Access files fromany computer

Allow others toaccess their files

View time-criticaldata and images

immediately

Store offsitebackups

Provide datacenter functions

MO1 MO2

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output, communication and network devices.

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A Member Of

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Optical Discs An optical disc consists of a flat, round, portable

disc made of metal, plastic, and lacquer that is

written and read by a laser

Typically store software, data, digital photos,

movies, and music

Read only vs. rewritable

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COM1012

Optical Discs

A CD-ROM can be read from but not written to

Read from a CD-ROM drive or CD-ROM player

A CD-R is a multisession optical disc on whichusers can write, but not erase

A CD-RW is an erasable multisession disc

Must have a CD-RW drive

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output, communication and network devices.

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Optical Discs

A DVD-ROM is a high-capacity optical disc onwhich users can read but not write or erase

Requires a DVD-ROM drive

A Blu-ray Disc-ROM (BD-ROM) has a storagecapacity of 100 GB

DVD-RW, DVD+RW, and DVD+RAM are high-capacity rewritable DVD formats

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Other Types of Storage

Tape

Magnetic stripe

cards and smartcards

Microfilm andmicrofiche

Enterprisestorage

25

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Other Types of Storage

Tape is a magnetically coated ribbon of plastic capable of

storing large amounts of data and information A tape drivereads and writes data and information on a

tape

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Other Types of Storage A magnetic stripe card

contains a magnetic

stripe that storesinformation

A smart cardstores data

on a thin microprocessorembedded in the card

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Other Types of Storage

Microfilm and

microfiche store

microscopic images of

documents on a roll

or sheet film

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Other Types of Storage

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Other Types of Storage

Enterprise storage stores huge volumes of dataand information for large businesses

Uses special hardware for heavy use, maximum

availability, and maximum efficiency30

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Summary

Various storage media andstorage devices

Internal hard disks, external and

removable hard disks, solid statedrives, memory cards, USB flash

drives, ExpressCard modules,cloud storage, CDs, DVDs, and

Blu-ray Discs, tape, smart cards,

and microfilm and microfiche

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