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Chapter 3: S torage Capacity & Storage Media

Chapter 3: S torage Capacity & Storage Media. Abbey Clark & Susan Holl . What’s in a Byte ?!. A byte is a unit of storage created by on-off pulses in a computer. Types of Storage. Floppy Disk Mylar disk inside plastic shell Holds up to 1,444,000 bytes (1.44 megabytes)

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Chapter 3: S torage Capacity & Storage Media

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  1. Chapter 3:Storage Capacity & Storage Media Abbey Clark & Susan Holl

  2. What’s in a Byte?! A byte is a unit of storage created by on-off pulses in a computer.

  3. Types of Storage • Floppy Disk • Mylar disk inside plastic shell • Holds up to 1,444,000 bytes (1.44 megabytes) • Getting a little dated; some computers no longer include floppy disk drives • Hard Disk • Permanently mounted inside the computer • Storage ranges but is typically multiple gigabytes (billions of bytes) or data • Usually designated the C drive  is the primary mass storage area for both programs and data

  4. Removable Media • Portable disks and cartridges that can be added to a computer • Cartridges vary in size from 250 megabytes to 1 gigabyte • A portable hard disk is a self-contained disk and drive that plugs into a computer port • Portable hard disks can vary from a few to hundreds of gigabytes in capacity • Very convenient for transporting large multimedia files • Examples: USB flash drive, floppy disk, CD/DVD

  5. CD-ROM • Holes and flat areas are read by a laser mounted in a CD drive. • CD-ROMs are read only, making them a one-way storage, unlike disks. (ROM= Read Only Memory) • CD-R • CD-Rs are special CDs that can be written on once and read multiple times. They require a recordable drive to create them but can be read by any CD drive. • CD-RW • CD-RWs are CDs that are rewritable but require a CD-RW drive to store and erase data. CD-RWs can be read my most CD drives. • CDs can store up to 650 megabytes • Often used for multimedia because of their large capacity for storing audio, video, and text.

  6. DVD-ROM • DVDs are optical media that can store up to 17 gigabytes of data. • DVD-ROMs are read-only. After initial recording, data cannot be stored on them. • DVD-Rs • Are recordable but require a DVD writer • Three competing formats are available: DVD-R/W and DVD-RW. DVD RAM offers other features but is incompatible with some players. • DVD-Rs and DVD-RWs can record up to 2 hours of quality video.

  7. Works Cited • Lever-Duffy, McDonald Mizell. Teaching and Learning With Technology, Second Edition. • www.courseweb.unt.edu/rhondac/fall2005/ch03.ppt#296,13,howcomputerswork

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