ec602-chapter 1 1storagedevices

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EC602COMPUTER SYSTEMDIAGNOSIS

AND MAINTENANCE

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Chapter 1_1PERSONAL COMPUTERCOMPONENTS

Computer System Diagnosis and

Maintenance2

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Storage Devices

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3 1.1.1-Storage Devices


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Storage Devices

Device to store data permanent / not

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1.1.1-Storage Devices


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Storage Devices

Floppy disk drive

hard disk drive

CD / DVD / RW

Removable storage

Tape drives

External CD-RW and hard drive Thumb drive, flash and SD cards

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Magnetic Tape

Pita MagnetikGelungan Pita Magnetik

LabelKeluaran

Fail 1 Fail 2

Tanda titikmuat

Tanda hujungpita

Struktur pita

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Floppy Disk Drive

1.4 Mb storage space

2005 3-inch drives common equipment

become pretty much obsolete

portable storage options, such as USBstorage devices and recordable orrewritable CDs / DVDs have taken itsplace


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Floppy Disk (FD)


8-inch, 5 14-inch, 312-inch

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ZIP Disk / Drive


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Floppy Disk Drive (FDD)


8-inch, 5 14-inch, 312-inch

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Floppy Disk Drive Cables


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Hard Disk Drive

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Hard Disk Drive (HDD)

data storage device that stores data on amagnetic surface layered onto hard disk

platters

Range of capacity 40Gb to 4 Tb


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What is Hard Disk Drive?

Sealed Metal HousingThe housing protects the internalcomponents from dust particles that couldblock the gap between the read/write headsand the platters, causing the hard drive tocrash.

Drive SpindleThe drive spindle is connected to a motorwhich spins one or more magneticallycoated platters at several thousandrevolutions per minute. More platters meangreater disk storage capacity.

Head ActuatorThis component moves thecollection of read/write heads acrossthe surface of the platters withextreme accuracy. It aligns the heads

with the tracks that lie in concentriccircleson the platters.

Read/Write HeadThese read/write heads move inunison across the surfaces of theplatters. The heads write data to theplatters by aligning magneticparticles on the surface and read databy detecting the polarity of theparticles.

SectorWhen formatting the hard drive, thecomputer divides the disk into radialsections called sectors.

TrackCircular and concentric pathsthe read/write heads follow

when reading information fromthe disk.

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HDD Form Factors

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Actuator

Platters or

disks

Read/writehead

Spindle

Spindle Motor

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How HDD Works?

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Comparison HDD Head Size

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How Disk Space Organized?

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Locating a Block of Data

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Types of HDD ESDI(Enhanced Small Disk Interface) was an

interface developed by Maxtor to allow fastercommunication between the PC and the

disk. SCSI(Small Computer System Interface) was

an early competitor with ESDI, originallynamed SASI for Shugart Associates.

ATA / IDE and EIDE(Advanced Technology

Attachment, also known as EnhancedIntegrated Drive Electronics)

SATA(Serial ATA)


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HDD Interface Connection

A regular flat ribbon 40-pins/wires IDE cable with3 connectors, alsoreferred to as an IDE-33cable.

The primary and thesecondary IDEconnector on themainboard

IDE

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HDD Interface Connection

SATA

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Solid State Drive (SSD)


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Optical Storage Devices

CD / CD-R / CD-RW

DVD / DVD-R / DVD-RW

HD DVD

Blue-Ray


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CD / CD-R / CD-RW


MINI CD 8cm Standard CD 12cm

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155-210 MB

650-700 MB

CD Business Card78x60cm

30 - 100 MB


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CD/-R/-RW SPECIFICATION


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CD / CD-R / CD-RW Compact Disc Read-Only Memory Used for data

storage and data transfer. A standard 120mm CD-ROM holds 650 or 700 Mb of data

CD-RW recorder can rewrite 700 MB of data to aCD-RW disc roughly 1000 times.

CD-RW recorders can also write CD-R discs. Exceptfor the ability to completely erase a disc, CD-RWsact very much like CD-Rs.

CD-RWs cannot be read in CD-ROM drives built

prior to 1997. CD-R is considered a better technology for

archival purposes as disc contents cannot bemodified.


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Compact Disk

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What is a CD-ROMsCompact disc that uses

same laser technology asaudio CDs for recordingmusic

Cannot erase or modifycontents

Typical CD-ROM holdsabout 650 MB

Commonly used to

distribute software andgames

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CD-R and CD-RWCompact disc onto which you can record text,

graphics, and audio

Write on CD-R using CD burner (recorder) or CD-Rdrive and special software

CD-R drive can read and write both audio CDs andstandard CD-ROMs

Cannot erase discs contents

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CD-R and CD-RWErasable disc you can write onmultiple times

Must have a CD-RW disc,

CD-RW software,and CD-RW drive

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CD-ROMData physically

embedded into discsurface

Surface laid out as

one continuousspiral of sectors ofequal length thathold equal amounts

of data in pits andlands


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CD-ROM

Read-only

Slower to access than hard drives

Used to distribute software and sound files

Combines constant linear velocity (CLV)and constant angular velocity (CAV)

Look for multisession feature

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CD-ROM Drive Manufacturers

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CD-ROMsCaring for CD-ROM drives and discs Use precautions when handling

CD-ROM drive interface withmotherboard IDE interface (most common)

SCSI interface with SCSI host adapter

Proprietary expansion card that works only with

CD-ROMs from a particular manufacturer Proprietary connection on sound card

Portable drive; plug into external port on PC

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CD-Read Only Memory Drive

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Installing a CD-ROM Drive

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CD-RW SpeedCD-RW drives have three speeds that are

designated with three numbers or

sometimes three "X" numbers; forexample, 40/12/48 or 40x/12x/48x." Thenumbers are write/rewrite/read speeds.

First X / Second X / Third X

CD-R write / CD-RW write / CD-ROM read


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Part of CD-ROM Drive


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DVD / DVD-R / DVD-RW


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DVD / DVD-R / DVD-RWDigital Versatile Disc or Digital Video Disc

is an optical disc storage media for data

storage, including movies with high qualityvideo and sound.

DVDs resemble compact discs as theirphysical dimensions are the same but

they are encoded in a different formatand at a much higher density allowing fora greater data capacity of about 4.7 GB


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DVD-ROMs High capacity compact disc capable of storing

from 4.7 GB to 17 GB

Must have DVD-ROM drive or DVD player to read

DVD-ROM Primarily used for movies

Next-generation software will be delivered onDVD


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DVD-ROMs Storage Capacity

Two layers of pits are used, where lower layer issemitransparent

Laser can read through it to upper layer

DVD+RWis a rewritable DVD

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Types of DVD


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Size of data on Optical DiskUDO (Ultra Density Optical)


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Size of data on Optical Disk



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Size of data on Optical Disk

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CD&DVD Drive - IDE Connection

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Installing a DVD Drive

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Optical Disk

Review

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Optical Drive Dimension

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HD DVD / Blu-Ray Disk

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The Difference Blu-ray & DVD

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HD DVD / Blu-Ray Disk

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The Difference DVD & HD DVD

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DVD Regions Code



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Thumb drive, flash and SD

cards

small, lightweight, removable andrewritable data storage devices.

Some recent USB flash drives act as twodrives - as a removable disk device , andas a USB floppy drive.

This is likely intended to make it easier to

use them as a bootable device.

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SD Card,

MMC Card,

microSD CardPin terminal

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Memory Cards/Stick

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SD MemoryCardTypes : SD, SDHC, SDXC,

Class : 2, 4, 6, 10, UHS

Form Factor : SD, MiniSD,MicroSD.


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https://www.sdcard.org/



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SD Min/Max. Write Speed

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Speed Vs Capacity

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http://www.toshibadata.com.sg/



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