Discovering Computers - Chapter 7: Storage Differentiate between storage devices and storage media; Describe the characteristics of magnetic disks; Differentiate between floppy disks and Zip disks; Describe the characteristics of a hard disk. | Chapter 7 Storage Chapter 7 Objectives Differentiate between storage devices and storage media Describe the characteristics of magnetic disks Differentiate among CD-ROMs, recordable CDs, rewritable CDs, DVD-ROMs, recordable DVDs, and rewritable DVDs Differentiate between floppy disks and Zip disks Identify the uses of tape Describe the characteristics of a hard disk Discuss PC Cards and the various types of miniature mobile storage media Describe the characteristics of optical discs Identify uses of microfilm and microfiche Next Storage What is storage? Holds data, instructions, and information for future use Storage medium is physical material used for storage Also called secondary storage p. 354 Fig. 7-1 Next Storage What is capacity? Number of bytes (characters) a storage medium can hold Kilobyte (KB) 1 thousand Megabyte (MB) 1 million Gigabyte (GB) Terabyte (TB) 1 trillion Petabyte (PB) 1 quadrillion Exabyte (EB) 1 quintillion Zettabyte (ZB) 1 sextillion Yottabyte (YB) p. 356 1 billion 1 septillion Next Storage How does volatility compare? Storage medium is nonvolatile—contents retained when power is off Memory is volatile—holds data and instructions temporarily Nonvolatile Volatile ON p. 356 OFF Screen Display Display appears Display disappears Memory (most RAM) (chips on motherboard) Data and instructions available to user Data and instructions erased Storage Medium (floppy disks, Zip disks, hard disks, CDs) Contents available to .
