Discovering Computers Living in a Digital World
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1 Discovering Computers 2011 Living in a Digital World
2 Objectives Overview See Page 351 for Detailed Objectives 2
3 Objectives Overview See Page 351 for Detailed Objectives 3
4 Storage Pages
5 Storage Pages Figure 7-1 5
6 Storage Capacityis the number of bytes a storage medium can hold Page 354 Figure 7-2 6
7 Storage A storage deviceis the computer hardware that records and/or retrieves items to and from storage media Page 354 7
8 Storage Access time measures: 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 355 Figure 7-4 8
9 Hard Disks A hard diskcontains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information Page 355 Figure 7-5 9
10 Hard Disks Hard disks can store data using longitudinal recording or perpendicular recording Page 356 Figure 7-6 Click to view Web Link, click, Click Web Link from left navigation, then click Perpendicular Recording below 10
11 Hard Disks Characteristics of a hard disk include: Page 357 Figure
12 Hard Disks Formattingis the process of dividing the disk into tracks and sectors so that the operating system can store and locate data and information on the disk Page 357 Figure
13 Hard Disks Page 358 Figure
14 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 358 Figure
15 Hard Disks A head crash occurs when a read/write head touches the surface of a platter Always keep a backupof your hard disk Pages Figure
16 Hard Disks Page 359 Figure
17 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 360 Figure 7-13 Click to view Web Link, click, Click Web Link from left navigation, then click Network Attached Storage below 17
18 Hard Disks Pages Figures
19 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 Pages Click to view Web Link, click, Click Web Link from left navigation, then click esata below 19
20 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: Pages
21 Flash Memory Storage Page 363 Figure 7-17 Click to view Web Link, click, Click Web Link from left navigation, then click Solid State Drives below 21
22 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
23 Flash Memory Storage Pages Figures Click to view Web Link, click, Click Web Link from left navigation, then click SDHC Cards below 23
24 Flash Memory Storage Page 366 Figure
25 Flash Memory Storage USB flash drivesplug into a USB port on a computer or mobile device Page 367 Figure
26 Video: Thumb Drive (USB Flash Drive) Encryption CLICK TO START 26
27 Flash Memory Storage An ExpressCard module is a removable device that fits in an ExpressCard slot Developed by the PCMCIA Commonly used in notebook computers Page 367 Figure
28 Cloud Storage Cloud storage is an Internet service that provides storage to computer users Page 368 Figure
29 Cloud Storage Page 368 Figure
30 Cloud Storage Users subscribe to cloud storage for a variety of reasons: Page 369 Click to view Web Link, click, Click Web Link from left navigation, then click Cloud Storage below 30
31 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 Page 370 Figure
32 Optical Discs Page 370 Figure
33 Optical Discs Optical discs commonly store items in a single track that spirals from the center of the disc to the edge Track is divided into evenly sized sectors Page 371 Figure
34 Optical Discs Care of optical discs Page 371 Figure
35 Optical Discs Pages Figure
36 Optical Discs Page
37 Optical Discs Page 374 Figure
38 Optical Discs Pages Figure 7-29 Click to view Web Link, click, Click Web Link from left navigation, then click Blu-ray below 38
39 Other Types of Storage Page
40 Other Types of Storage Tapeis 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 376 Figure
41 Other Types of Storage A magnetic stripe card contains a magnetic stripe that stores information A smart cardstores data on a thin microprocessor embedded in the card Page 377 Figure 7-36 Click to view Web Link, click, Click Web Link from left navigation, then click Smart Cards below 41
42 Other Types of Storage Microfilmand microfichestore microscopic images of documents on a roll or sheet film Page 378 Figure
43 Other Types of Storage Page 378 Figure
44 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 Page 379 Figure 7-39 Click to view Web Link, click, Click Web Link from left navigation, then click Enterprise Storage below 44
45 Putting It All Together Page 380 Figure
46 Putting It All Together Page 380 Figure
47 Summary Page
48 Discovering Computers 2011 Living in a Digital World Complete
Chapter 7 Types of Storage. Discovering Computers Your Interactive Guide to the Digital World. Discovering Computers 2012: Chapter 7 2
Chapter 7 Types of Storage Discovering Computers 2012 Your Interactive Guide to the Digital World 2 3 4 Storage Storage Capacityis the number of bytes a storage medium can hold Pages 352 353 Figure 7-1
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