STORAGE

STORAGE

1. What Is It?

   • STORAGE DEVICE
     • READING
       • Functions as source of input
         • Process of transferring items from memory to storage media
     • WRITING
       • Creates output
         • Process of transferring items from storage media to memory
   • CAPACITY
     • Number of bytes (characters) a storage medium
   • STORAGE
     • Holds data, instructions, and information for future use
   • ACCEESS TIME
     • 1. Time it takes storage device to locate item on storage medium Next
     • 2. Time required to deliver item from memory to processor
   • FLOPPY DISK
     • Portable, inexpensive storage medium (also called diskette)
     • FLOPPY DISK DRIVE
       • Device that reads from and writes to floppy disk
   • ZIP DISK
     • 1. Magnetic medium that stores 100 MB to 750 MB of data
     • 2.Used to back up and to transfer files
   • HARD DISK
     • 1. High-capacity storage
     • 2. Consists of several inflexible, circular platters that store items electronically
     • 3. Components enclosed in airtight, sealed case for protection
     • 1. EXTERNAL HARD DISKS
       • Freestanding hard disk that connects to system unit
     • 2. REMOVABLE HARD DISK
       • Hard disk that you insert and remove from hard disk drive
   • TAPE
     • 1. Magnetically coated plastic ribbon capable of storing large amounts of data at low cost
       • 2. Primarily used for backup
   • CDs AND DVDs?
     • 1. Flat, round, portable metal discs made of metal, plastic, and lacquer
     • 2. Can be read only or read/write
       • 3. Most PCs include CD or DVD drive, most play audio CDs
   • PC CARD
     • 1. Adds capabilities to computer
     • 2. Credit-card-sized device commonly used in notebook computers
   • MINIATURE MOBILE STORAGE MEDIA
     • Storage for small mobile devices
     • CARD READER
       • 1. Reads information stored on miniature mobile storage media
         • 2. Type of card determines type of card reader needed
     • SMART CARD
       • 1. Stores data on microprocessor embedded in small card
         • 2. Input, process, output, and storage capabilities
     • E-MONEY
       • 1. Means of paying for goods and services over the Internet Also called digital cash
         • 2. Means of paying for goods and services over the Internet Also called digital cash
           • 3. Sometimes placed on smart card
             • 4. Money is withdrawn from your bank account
   • MICROFILM AND MICROFICHE
     • Store microscopic images of documents on roll or sheet of film

Images and files in the map