Unit 8
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Unit 8 Storage Devices Purposes Need non-volatile source Keep for later use Transport to another place/computer Retain for archive Types of Storage Devices Floppy Disk Hard Disk CD-ROM Back up Devices Floppy Disk Floppy Drive Types 5.25” floppy disk (old) 3.5” floppy disk (now)

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Unit 8 l.jpg
Unit 8

  • Storage Devices


Purposes l.jpg
Purposes

  • Need non-volatile source

  • Keep for later use

  • Transport to another place/computer

  • Retain for archive


Types of storage devices l.jpg
Types of Storage Devices

  • Floppy Disk

  • Hard Disk

  • CD-ROM

  • Back up Devices



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Floppy Drive Types

  • 5.25” floppy disk (old)

  • 3.5” floppy disk (now)


Floppy drive equipment l.jpg
Floppy Drive Equipment

  • Disk drive

  • Diskettes


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Traditional Uses

  • Install New Programs (changing now)

  • Transfer data

  • Increase Hard Disk Space

  • Back Up Data


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Evolving Uses

  • Install small programs only

  • Transfer small amount of data

  • (Other equipment replacing floppies!)


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Floppies Specifications

  • Capacity

    • Double-Density (DS/DD)

    • High-Density (HD)

  • Pre-formatted


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Protecting a Floppy

  • Write protection

  • Store in container

  • Protect from environment



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Note Regarding Terms

  • Disk

  • Drive

  • Used interchangeably!


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Hard Disk Equipment

  • Hard disk enclosed in protective shell

  • Software to format

  • No external access!


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Uses of Hard Drive

  • Store files

    • Program Files

    • Data Files


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Storing Process

  • Computer: controller

  • User

    • Create folders by topic

    • (Subdirectory)


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Hard Drive Specifications

  • Capacity (Mb, Gb)

  • Average Access Time (ms)


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Connection Types

  • IDE (older)

  • EIDE (newer)

  • SCSI (high end)


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Purposes of Disk Cache

  • Speeds up computer

  • Stores recently used data

  • Updated constantly


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Create More Disk Space

  • Archive unneeded information

  • Delete files

  • Compress data


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Hard Drive Maintenance

  • Optimize...

  • Virus...

  • Back Up Data...


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Optimize a Hard Drive

  • Defragment a drive

  • Scan disk to repair a drive


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Ways to Get a Virus

  • Shared floppy disk

  • Modem/Internet

  • Shareware programs

  • Protect with: Anti-Virus Program


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Back Up Data

  • Back up data files

  • Back up frequently


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Removable Hard Drives

  • (Back up option)

  • Archive Data

  • Protect Data

  • Transfer Data



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CD-ROM Equipment

  • CD-ROM Drive

  • Software

  • CD-ROM Disc


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Uses for CDs

  • Install software

  • Run program from CD

  • Any multimedia application

  • Play Music CDs


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Children

Education

Games

Reference

General Interest

Time-Sensitive information

Programs on CDs


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Factors in CD-ROMs

  • Speed

  • Average Access Time

  • Multisession (read info stored over other info!)


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Using the CD-ROM

  • Insert in tray

  • Handle from edges

  • Use jewel case


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New CD-ROM Items

  • Recordable CDs

  • DVD-ROM



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Traditional Tape Drive

  • Drive unit

  • Software

  • Cartridges ($$)


Tape drive l.jpg
Tape Drive

  • Tape cartridges

  • Applications

    • Back up data

    • Archive data

    • Transfer data


Other devices l.jpg
Other Devices

  • Traditional

    • QIC Drive

    • Travan Drive

    • DAT Drive

  • New

    • Zip Drive


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Backup Tips

  • Schedule Backups -- like brushing your teeth

  • Data Compression

  • Record date of purchase


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Types of Backups

  • Full

  • Incremental


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