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Discovering Computers Fundamentals, 2012 Edition

Discovering Computers Fundamentals, 2012 Edition. Chapter Six: Storage. Objectives Overview. See Page 237 for Detailed Objectives. Objectives Overview. See Page 237 for Detailed Objectives. Storage. Pages 238 - 239. Storage. Pages 238 – 239 Figure 6-1. Storage.

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Discovering Computers Fundamentals, 2012 Edition

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  1. Discovering Computers Fundamentals, 2012 Edition Chapter Six: Storage

  2. Objectives Overview See Page 237 for Detailed Objectives

  3. Objectives Overview See Page 237 for Detailed Objectives

  4. Storage Pages 238 - 239

  5. Storage Pages 238 – 239 Figure 6-1

  6. Storage • Capacity is the number of bytes a storage medium can hold Page 240 Figure 6-2

  7. Storage • A storage deviceis the computer hardware that records and/or retrieves items to and from storage media Page 240

  8. Storage • Access timemeasures: • The amount of time it takes a storage device to locate an item on a storage medium • The time required to deliver an item from memory to the processor Page 240

  9. Hard Disks • A hard diskcontains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information Pages 240 - 241 Figure 6-3

  10. Hard Disks • Characteristics of a hard disk include: Page 242 Figure 6-5

  11. Hard Disks Page 243 Figure 6-6

  12. Hard Disks • The hard disk arms move the read/write head, which reads items and writes items in the drive • Location often is referred to by its cylinder Page 243 Figure 6-7

  13. Hard Disks • A head crash occurs when a read/write head touches the surface of a platter • Always keep a backup of your hard disk Page 244 Figure 6-8

  14. Hard Disks • RAID (redundant array of independent disks) is a group of two or more integrated hard disks • A network attached storage(NAS) device is a server connected to a network with the sole purpose of providing storage Page 244

  15. Hard Disks Pages 244 – 245 Figures 6-9 – 6-10

  16. Hard Disks • A disk controller consists of a special-purpose chip and electronic circuits that control the transfer of data, instructions, and information from a disk to and from the system bus and other components of the computer • SATA - Serial ATA is a computer bus interface for connecting host bus adapters to mass storage devices • EIDE - Enhanced IDE is an interface standard for the connection of storage devices such as hard disks, floppy drives, and optical disc drives • SCSI - is a set of standards for physically connecting and transferring data between computers and peripheral devices. • SAS - is a point-to-point serial protocol that is used to move data to and from computer storage devices such as hard drives and tape drives. Page 246

  17. Flash Memory Storage • Flash memory chips are a type of solid state media and contain no moving parts • Solid state drives (SSDs) have several advantages over magnetic hard disks: Page 247

  18. Flash Memory Storage • A memory cardis a removable flash memory device that you insert and remove from a slot in a computer, mobile device, or card reader/writer Page 248

  19. Flash Memory Storage Pages 248 - 249 Figures 6-13 – 6-14

  20. Flash Memory Storage • USB flash drivesplug into a USB port on a computer or mobile device Page 250 Figure 6-15

  21. Flash Memory Storage • An ExpressCard moduleis a removable device that fits in an ExpressCard slot • Commonly used in notebook computers Page 250 Figure 6-16

  22. Cloud Storage • Cloud storageis an Internet service that provides storage to computer users Page 251 Figure 6-17

  23. Cloud Storage Page 251 Figure 6-18

  24. Cloud Storage • Users subscribe to cloud storage for a variety of reasons: Page 252

  25. Optical Discs • An optical disc consists of a flat, round, portable disc made of metal, plastic, and lacquer that is written and read by a laser • Typically store software, data, digital photos, movies, and music • Read only vs. rewritable Pages 252 - 253 Figure 6-19

  26. Optical Discs Pages 253 - 255 Figure 6-21

  27. Optical Discs Pages 253 and 256 Figure 6-21

  28. Other Types of Storage • Tape is a magnetically coated ribbon of plastic capable of storing large amounts of data and information • A tape drivereads and writes data and information on a tape Page 257 Figure 6-26

  29. Other Types of Storage • A magnetic stripe cardcontains a magnetic stripe that stores information • A smart cardstores data on a thin microprocessor embedded in the card Page 257 Figure 6-27

  30. Other Types of Storage • Microfilm and microfiche store microscopic images of documents on a roll or sheet film Page 258 Figure 6-28

  31. Other Types of Storage Page 258 Figure 6-29

  32. Other Types of Storage • Enterprise storage stores huge volumes of data and information for large businesses • Uses special hardware for heavy use, maximum availability, and maximum efficiency Pages 258 - 259

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