4-1 Copyright Prentice-Hall, Inc. 1998 Disks & Tape Backup Units CHAPTER4.

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Presentation transcript:

4-1 Copyright Prentice-Hall, Inc Disks & Tape Backup Units CHAPTER4

4-2 Copyright Prentice-Hall, Inc Fundamental Components

4-3 Copyright Prentice-Hall, Inc Secondary Storage & Files Disks Disks  Magnetic Disk Drives  Optical Laser Disk Tape Tape  Magnetic Tape Drives Disks Disks  Magnetic Disk Drives  Optical Laser Disk Tape Tape  Magnetic Tape Drives

4-4 Copyright Prentice-Hall, Inc Storage Capacities

4-5 Copyright Prentice-Hall, Inc Storage Costs

4-6 Copyright Prentice-Hall, Inc Types of Files ASCII File ASCII File Data File Data File Document File Document File Spreadsheet File Spreadsheet File Source Program File Source Program File ASCII File ASCII File Data File Data File Document File Document File Spreadsheet File Spreadsheet File Source Program File Source Program File

4-7 Copyright Prentice-Hall, Inc Spreadsheets (Excel)

4-8 Copyright Prentice-Hall, Inc Types of Files Executable Program File Executable Program File Graphics File Graphics File Audio File Audio File Video File Video File Executable Program File Executable Program File Graphics File Graphics File Audio File Audio File Video File Video File

4-9 Copyright Prentice-Hall, Inc Information Kiosk

4-10 Copyright Prentice-Hall, Inc What To Do With a File? Create, Name & Save Create, Name & Save Copy, Move & Delete Copy, Move & Delete Retrieve & Update Retrieve & Update Display, Print & Play Display, Print & Play Create, Name & Save Create, Name & Save Copy, Move & Delete Copy, Move & Delete Retrieve & Update Retrieve & Update Display, Print & Play Display, Print & Play

4-11 Copyright Prentice-Hall, Inc What To Do With a File? Execute Execute Download & Upload Download & Upload Export & Import Export & Import Compress Compress Protect Protect Execute Execute Download & Upload Download & Upload Export & Import Export & Import Compress Compress Protect Protect

4-12 Copyright Prentice-Hall, Inc Backup Procedures

4-13 Copyright Prentice-Hall, Inc Backup Procedures con’t

4-14 Copyright Prentice-Hall, Inc File Accessibility Sequential Processing Sequential Processing  Magnetic Tapes Random Processing Random Processing  Compact Discs Sequential Processing Sequential Processing  Magnetic Tapes Random Processing Random Processing  Compact Discs

4-15 Copyright Prentice-Hall, Inc Magnetic Disks Interchangeable Magnetic Disks Interchangeable Magnetic Disks Fixed Magnetic Disks Fixed Magnetic Disks Interchangeable Magnetic Disks Interchangeable Magnetic Disks Fixed Magnetic Disks Fixed Magnetic Disks

4-16 Copyright Prentice-Hall, Inc Microcomputer Environment 5 1/4 & 3 1/2 Floppy Disks 5 1/4 & 3 1/2 Floppy Disks Floptical Disk Drive Floptical Disk Drive The Hard Disk The Hard Disk Interchangeable Hard Disks (Jaz Drive) Interchangeable Hard Disks (Jaz Drive) 5 1/4 & 3 1/2 Floppy Disks 5 1/4 & 3 1/2 Floppy Disks Floptical Disk Drive Floptical Disk Drive The Hard Disk The Hard Disk Interchangeable Hard Disks (Jaz Drive) Interchangeable Hard Disks (Jaz Drive)

4-17 Copyright Prentice-Hall, Inc Hard Disk Array

4-18 Copyright Prentice-Hall, Inc Removable Media (ZIP and JAZ Drives)

4-19 Copyright Prentice-Hall, Inc Disk Organization Tracks & Sectors Tracks & Sectors  Disk Address Cylinders Cylinders Formatting Formatting Disk Access Time Disk Access Time Disk Caching Disk Caching Tracks & Sectors Tracks & Sectors  Disk Address Cylinders Cylinders Formatting Formatting Disk Access Time Disk Access Time Disk Caching Disk Caching

4-20 Copyright Prentice-Hall, Inc Disk Components

4-21 Copyright Prentice-Hall, Inc Hard Disk Components

4-22 Copyright Prentice-Hall, Inc Computer Viruses

4-23 Copyright Prentice-Hall, Inc Virus Infections

4-24 Copyright Prentice-Hall, Inc Anti-viral Software

4-25 Copyright Prentice-Hall, Inc Magnetic Tape Magnetic Tape Cartridges

4-26 Copyright Prentice-Hall, Inc Magnetic Tape

4-27 Copyright Prentice-Hall, Inc Optical Laser Disks CD-ROM CD-ROM DVD DVD CD-R CD-R WORM Disks WORM Disks Rewritable Optical Disks Rewritable Optical Disks CD-ROM CD-ROM DVD DVD CD-R CD-R WORM Disks WORM Disks Rewritable Optical Disks Rewritable Optical Disks

4-28 Copyright Prentice-Hall, Inc CD-ROM Concepts

4-29 Copyright Prentice-Hall, Inc WORM CD Drive

4-30 Copyright Prentice-Hall, Inc Summary Discussion

4-31 Copyright Prentice-Hall, Inc High Storage Applications

4-32 Copyright Prentice-Hall, Inc Coming Soon Input/Output: Computers in Action Chapter 5