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8. CHAPTER. SECONDARY STORAGE. 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.

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  1. 8 CHAPTER SECONDARY STORAGE

  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. 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. Primary storage Volatile Temporary Secondary storage Nonvolatile Permanent Secondary storage characteristics Media Capacity Storage devices Access speed Storage RAM Page 212

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

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

  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. 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. 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

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

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

  12. Hard Disk Performance Enhancements • Disk caching • Redundant arrays of inexpensive disks (RAID) • File compression and decompression RAID storage device Page 217

  13. Optical Disks • Compact • Permanent storage • Laser beams reflect off pits • Two common types • CD • DVD Page 219

  14. 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

  15. 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

  16. Other Types of Secondary Storage • Solid-state storage • Internet hard drives • Magnetic tape Page 221

  17. A Look to the FutureBlu-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

  18. 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

  19. 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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