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Chapter 7 Storage

Chapter 7 Storage. Memory Versus Storage. Contents of storage retained when power is off. Screen display and contents of most RAM (memory) erased when power is off. Next. How does volatility compare?. p. 7. 4 Fig. 7-2. What is capacity ?.

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Chapter 7 Storage

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  1. Chapter 7Storage

  2. Memory Versus Storage Contents of storage retained when power is off Screen display and contents of most RAM (memory) erased when power is off Next How does volatility compare? p. 7. 4 Fig. 7-2

  3. What is capacity? Numberof bytes (characters) storage medium can hold Memory Versus Storage Storage Term Number of bytes Abbreviation Kilobyte KB 1 thousand Megabyte MB 1 million 1 billion Gigabyte GB Terabyte 1 trillion TB Petabyte PB 1 quadrillion Next p. 7. 5 Fig. 7-3

  4. What is a head crash? Occurs when read/write head touches platter surface Spinning creates cushion of air that floats read/write head above platter Hard Disks gap is half the diameter of a dust particle clearance between head and platter is approximately two millionths of an inch hair read/write head dust smoke gap Next platter p. 7. 12 Fig. 7-15

  5. What is tape? Magnetically coated ribbon of plastic capable of storing large amounts of data and information at a low cost Primarily used for backup Tapes Next Click to view Web Link then click Tapes p. 7. 26 Fig. 7-32

  6. What is miniature mobile storage media? Handheld devices use to augment internal storage Miniature Mobile Storage Media CompactFlash 40 MB Cartridge Digital cameras, notebook computers Memory Stick 2 to 256 MB Memory Card Digital cameras, handheld computers, notebook computers, printers, cellular telephones Microdrive 1 GB Memory Card Digital cameras, handheld computers, music players, video cameras SmartMedia 2 to 128 MB Memory Card Digital cameras, handheld computers, photo printers, cellular telephones Next Click to view video p. 7. 28 Fig. 7-37

  7. How do life expectancies of various media compare? Microfilm and Microfiche Next p. 7.30 Fig. 7-41

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