##11

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Unit 8Unit 8

Storage DevicesStorage Devices

##22

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PurposesPurposes

•Need non-volatile sourceNeed non-volatile source•Keep for later useKeep for later use•Transport to another Transport to another

place/computerplace/computer•Retain for archiveRetain for archive

##33

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Types of Storage DevicesTypes of Storage Devices

•Floppy DiskFloppy Disk•Hard DiskHard Disk•CD-ROMCD-ROM•Back up DevicesBack up Devices

##44

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Floppy DiskFloppy Disk

##55

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Floppy Drive TypesFloppy Drive Types

•5.25” floppy disk (old)5.25” floppy disk (old)•3.5” floppy disk (now)3.5” floppy disk (now)

##66

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Floppy Drive EquipmentFloppy Drive Equipment

•Disk driveDisk drive•DiskettesDiskettes

##77

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Traditional UsesTraditional Uses

• Install New Programs Install New Programs (changing now)(changing now)

•Transfer dataTransfer data• Increase Hard Disk SpaceIncrease Hard Disk Space•Back Up DataBack Up Data

##88

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Evolving UsesEvolving Uses

• Install small programs Install small programs onlyonly

•Transfer small amount of Transfer small amount of datadata

•(Other equipment (Other equipment replacing floppies!)replacing floppies!)

##99

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Floppies SpecificationsFloppies Specifications

•CapacityCapacity–Double-Density Double-Density (DS/DD)(DS/DD)

–High-Density (HD)High-Density (HD)•Pre-formattedPre-formatted

##1010

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Protecting a FloppyProtecting a Floppy

•Write protectionWrite protection•Store in containerStore in container•Protect from environmentProtect from environment

##1111

Theory 8Theory 8

Hard diskHard disk

##1212

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Note Regarding TermsNote Regarding Terms

•DiskDisk•DriveDrive•Used interchangeably!Used interchangeably!

##1313

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Hard Disk EquipmentHard Disk Equipment

•Hard disk enclosed in Hard disk enclosed in protective shellprotective shell

•Software to formatSoftware to format•No external access!No external access!

##1414

Theory 8Theory 8

Uses of Hard DriveUses of Hard Drive

•Store filesStore files–Program FilesProgram Files–Data FilesData Files

##1515

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Storing ProcessStoring Process

•Computer: controller Computer: controller •UserUser

–Create folders by topicCreate folders by topic–(Subdirectory)(Subdirectory)

##1616

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Hard Drive SpecificationsHard Drive Specifications

•Capacity (Mb, Gb)Capacity (Mb, Gb)•Average Access Time Average Access Time

(ms)(ms)

##1717

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Connection TypesConnection Types

• IDE (older)IDE (older)•EIDE (newer)EIDE (newer)•SCSI (high end)SCSI (high end)

##1818

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Purposes of Disk CachePurposes of Disk Cache

•Speeds up computerSpeeds up computer•Stores recently used dataStores recently used data•Updated constantlyUpdated constantly

##1919

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Create More Disk SpaceCreate More Disk Space

•Archive unneeded Archive unneeded informationinformation

•Delete filesDelete files•Compress dataCompress data

##2020

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Hard Drive MaintenanceHard Drive Maintenance

•Optimize...Optimize...•Virus...Virus...•Back Up Data...Back Up Data...

##2121

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Optimize a Hard DriveOptimize a Hard Drive

•Defragment a driveDefragment a drive•Scan disk to repair a driveScan disk to repair a drive

##2222

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Ways to Get a VirusWays to Get a Virus

•Shared floppy diskShared floppy disk•Modem/InternetModem/Internet•Shareware programsShareware programs

•Protect with: Anti-Virus Protect with: Anti-Virus ProgramProgram

##2323

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Back Up DataBack Up Data

•Back up data filesBack up data files•Back up frequentlyBack up frequently

##2424

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Removable Hard DrivesRemovable Hard Drives

•(Back up option)(Back up option)•Archive DataArchive Data•Protect DataProtect Data•Transfer DataTransfer Data

##2525

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CD-ROMCD-ROM

##2626

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CD-ROM EquipmentCD-ROM Equipment

•CD-ROM DriveCD-ROM Drive•SoftwareSoftware•CD-ROM DiscCD-ROM Disc

##2727

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Uses for CDsUses for CDs

• Install softwareInstall software•Run program from CDRun program from CD•Any multimedia Any multimedia

applicationapplication•Play Music CDsPlay Music CDs

##2828

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Programs on CDsPrograms on CDs

• ChildrenChildren• EducationEducation• GamesGames• ReferenceReference

• General General InterestInterest

• Time-Time-Sensitive Sensitive informationinformation

##2929

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Factors in CD-ROMsFactors in CD-ROMs

•SpeedSpeed•Average Access TimeAverage Access Time•Multisession (read info Multisession (read info

stored over other info!)stored over other info!)

##3030

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Using the CD-ROMUsing the CD-ROM

•Insert in trayInsert in tray•Handle from edgesHandle from edges•Use jewel caseUse jewel case

##3131

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New CD-ROM ItemsNew CD-ROM Items

•Recordable CDsRecordable CDs•DVD-ROMDVD-ROM

##3232

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Backup DevicesBackup Devices

##3333

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Traditional Tape DriveTraditional Tape Drive

•Drive unitDrive unit•SoftwareSoftware•Cartridges ($$)Cartridges ($$)

##3434

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Tape DriveTape Drive

•Tape cartridgesTape cartridges•ApplicationsApplications

–Back up dataBack up data–Archive dataArchive data–Transfer dataTransfer data

##3535

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Other DevicesOther Devices

•TraditionalTraditional–QIC DriveQIC Drive–Travan DriveTravan Drive–DAT DriveDAT Drive

•NewNew–Zip DriveZip Drive

##3636

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Backup TipsBackup Tips

•Schedule Backups -- like Schedule Backups -- like brushing your teethbrushing your teeth

•Data CompressionData Compression•Record date of purchaseRecord date of purchase

##3737

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Types of BackupsTypes of Backups

•FullFull• IncrementalIncremental