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McGraw-Hill Technology Education © 2006 by the McGraw-Hill Companies, Inc. All rights reserved. 88 CHAPTER SECONDARY STORAGE.

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Presentation on theme: "McGraw-Hill Technology Education © 2006 by the McGraw-Hill Companies, Inc. All rights reserved. 88 CHAPTER SECONDARY STORAGE."— Presentation transcript:

1 McGraw-Hill Technology Education © 2006 by the McGraw-Hill Companies, Inc. All rights reserved. 88 CHAPTER SECONDARY STORAGE

2 CE06_PP08-2 Competencies (Page 1 of 2) Distinguish between primary & secondary storage Describe the traditional floppy disk and compare it to high capacity floppy disks Compare internal hard disks, hard-disk cartridges, and hard-disk packs Page 210

3 CE06_PP08-3 Competencies (Page 2 of 2) Describe ways to improve hard-disk operations, including disk caching, redundant arrays of inexpensive disks, and data compression and decompression Discuss the different types of optical disks; mass storage Describe solid-state storage, Internet drives, and magnetic tape Page 210

4 CE06_PP08-4 Storage Primary storage Volatile Temporary Secondary storage Nonvolatile Permanent Secondary storage characteristics Media Capacity Storage devices Access speed Page 212

5 CE06_PP08-5 Secondary Storage Devices Most desktop microcomputer systems have floppy disks, hard disks, and optical disk drives Page 212

6 CE06_PP08-6 Traditional Floppy Disk Also known as: Diskettes Floppies Portable storage media Floppy disk drives (FDD) Page 212 Insert Art Work top of page 213

7 CE06_PP08-7 High Capacity Floppy Disks Known as a floppy-disk cartridge Require special disk drives Three well known types Zip disks HiFD disks SuperDisks Page 214

8 CE06_PP08-8 Hard Disks Use thicker, metallic platters for storage Faster than a floppy diskette Large capacity Sensitive instruments There are three types of hard disks: Internal Hard-disk cartridge Hard-disk pack Page 215

9 CE06_PP08-9 Materials that Cause a Head Crash Head crash is a disaster for a hard disk Page 215 Return

10 CE06_PP08-10 Internal Hard Disk Located inside system unit Known as a fixed disk Designated as the C drive Advantages over floppies Access speed Capacity Page 215

11 CE06_PP08-11 Hard-Disk Cartridges Removable hard disks Used to complement internal hard disk Capacities of 10 to 20 GB PC Card Hard Disks Page 216 Hard-disk cartridge

12 CE06_PP08-12 Hard-Disk Packs Removable hard disk Massive storage capacity Common in mainframes Resembles stack of vinyl records Page 216

13 CE06_PP08-13 Hard Disk Performance Enhancements Disk caching Redundant arrays of inexpensive disks (RAID) File compression and decompression Page 217 RAID storage device

14 CE06_PP08-14 Optical Disks Compact Permanent storage Laser beams reflect off pits Two common types CD DVD Page 219

15 CE06_PP08-15 Compact Disc Optical format From 650 MB to 1 GB capacity Rotation speeds vary Types Read only: CD-ROM Write once: CD-R Rewriteable: CD-RW Picture CDs and Photo CDs Page 219

16 CE06_PP08-16 Digital Versatile Disc Digital Versatile Disk or Digital Video Disk (DVD) Similar to CDs, but can store more data Types Read only: DVD-ROM Write once: DVD+R; DVD-R Rewritable: DVD+RW; DVD-RW; DVD-RAM Page 220

17 CE06_PP08-17 Other Types of Secondary Storage Solid-state storage Internet hard drives Magnetic tape Page 221

18 CE06_PP08-18 Solid-State Storage Flash memory cards Widely used in notebook computers Used to record MP3 music files Key chain hard drives Key chain flash memory devices Connects to a USB port Page 221 Return

19 CE06_PP08-19 Internet Hard Drives Known as i-drive or online storage Page 224 Return

20 CE06_PP08-20 Magnetic Tape External storage Provides sequential access Information stored in sequence Slower than disks which provide direct access Magnetic tape streamers or tape cartridges used by both mainframes and microcomputers Page 225 Return

21 CE06_PP08-21 A Look to the Future Blu-Ray and Plastic Memory Technology New standard in storage is called Blu-Ray New disks use blue laser light instead of the red laser light used in traditional CD players Disks may ultimately hold Over 50GB on two-sided disks Equals several movies/TV shows Help to reduce incompatibility problems Page 227

22 CE06_PP08-22 Discussion Questions (Page 1 of 2) Discuss the three most likely successors to the 1.44 MB 3 ½ inch floppy. What are the three types of hard disks? Describe three ways to improve hard disk performance. What are the two most common optical disk formats? Describe the basic types for each format. Page 234

23 CE06_PP08-23 Discussion Questions (Page 2 of 2) Discuss solid-state storage, Internet hard drives, and magnetic tape. What are the advantages and disadvantages of each? Discuss mass storage, enterprise storage systems, and mass storage devices. Page 234

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