1 / 23

Understanding Computer Performance and Storage Devices

Learn about Elk Ridge Middle School's boot process, circuits, RAM vs. ROM, binary number system, memory measurements, storage devices, and optical storage. Gain insights into megahertz, Pentium processors, and memory cards.

rufina
Télécharger la présentation

Understanding Computer Performance and Storage Devices

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Computer Performance& Storage Devices Computer Technology Part 2 Elk Ridge Middle

  2. Computer Performance Elk Ridge Middle

  3. Boot Process • Sequence of events that occurs between the time you turn on a computer and the time that it becomes ready to accept commands. • Purposes • Runs a diagnostic test to make sure everything is working. • Loading the operating system, so the computer can carry out basic operations. Elk Ridge Middle

  4. 6 events of the boot process: • Power up • Start boot program • Power-on self-test • Identify peripheral devices • Load operation system • Check configuration and customization Elk Ridge Middle

  5. Circuits • The path from one component of a computer to another that data uses to travel. • Circuits run between • RAM and the microprocessor • RAM and various storage devices Elk Ridge Middle

  6. Silicon Chip • Silicon is melted sand. • What the circuits are embedded into to keep them together. Elk Ridge Middle

  7. Megahertz (mHz) • A measurement used to describe the speed of the system clock. • A megahertz is equal to one million cycles (or pulses) per second. • 1.3 GHz means that the microprocessor’s clock operates at a speed of 1.3 BILLION cycles per second. Elk Ridge Middle

  8. Pentium • Name of the CPU. • Pentium is the 5th generation of the Intel processor. • Other generations were called • 80-88 • 286 • 386 • 486 Elk Ridge Middle

  9. RAM vs. ROM System Crash! ROM RAM Elk Ridge Middle

  10. RAM vs. ROM RAM RAM • Read Only Memory • Permanent Storage • Where all your programs and files are saved—your hard drive. • The bigger your hard drive, the more you can save there. • Hard drives rarely crash—anything saved there is pretty safe—but it’s always good to have backups! • Random Access Memory • Temporary—content is lost if the device is powered off • Runs all currently open programs – the more open programs the slower your computer is • RAM is rather inexpensive—getting more RAM can speed up your computer. But there is a limit to how much RAM your computer can have. Elk Ridge Middle

  11. Binary Number System • A method for representing letters or numbers using only two digits, 0 and 1. • Bit • Each 0 or 1 • Byte • 8 bits • Also referred to as Base 2 Binary Code. Elk Ridge Middle

  12. Memory Measurements • Bit • Each 0 or 1 • Byte • 8 bits • Kilobyte • Approximately 1,000 bytes • Exactly 1,024 bytes • Megabyte • Approximately 1 million bytes • Exactly 1,048,576 bytes • Gigabyte • Approximately 1 billion bytes • Terabyte • Approximately 1 trillion bytes • Petabyte, Exabyte, Zettabyte, Zottabyte, Brontobyte Elk Ridge Middle

  13. Storage Devices • Used to keep data when the power to the computer is turned off. • Medium/media • Location where data is stored. • Write-Protected - A disk that will not allow a user to make changes to files Elk Ridge Middle

  14. Hard Disk • Usually mounted inside the computer’s system unit. • Can store billions of characters of data. • Stated in forms of bytes: • Megabytes or Gigabytes Elk Ridge Middle

  15. Floppy Disk • Round piece of flexible Mylar plastic covered with a thin layer of magnetic oxide and sealed inside a protective covering. • May be referred to as a “floppy” • 3½ disk capacity is 1.44 MB or 1,440,000 bytes Elk Ridge Middle

  16. Zip Disk • Floppy disk technology manufactured by Iomega. • Available in 100 MB and 250 MB versions Elk Ridge Middle

  17. USB Flash Drive • Also known as a “Jump Drive.” • Typically removable and rewritable, physically smaller than a floppy. • Storage capacities can be as large as 256 GB. Most are 2 to 8 GB. • Smaller, faster, thousands more times capacity, and are more durable and reliable. • Plug right into a USB port. Elk Ridge Middle

  18. Memory Card • Used for storing digital information, usually for digital camera, mobile phones, laptops, MP3 Players, and video game consoles. • Small, re-recordable and can retain data without power. • Usually store from 2 to 8 GB. Elk Ridge Middle

  19. Optical Storage • Means of recording data as light and dark spots on CD or DVD. • Reading is done through a low-power laser light. • Pits • Dark spots • Lands • Lighter, non-spotted surface areas Elk Ridge Middle

  20. CD-ROM • “CD – Read Only Memory” • Also called CD-R • CD-Read • Storage device that uses laser technology to read data that is permanently stored on compact disks, cannot be used to write data to a disk. Elk Ridge Middle

  21. CD-RW • “CD-Read Write” • A storage device that reads data from CD’s and also can write data to CD’s. • Similar to a CD-ROM, but has the ability to write to CD. Elk Ridge Middle

  22. DVD-ROM • “Digital Video Disks – Read Only Memory” • Reads data from CD’s (audio and data) and DVD’s (data or movie) • Cannot be used to write data to a disk. Elk Ridge Middle

  23. Resources Parsons, June Jamrich, and Dan Oja. Computer Concepts. Boston: Course Technology - Thompson Learning, 2002. Elk Ridge Middle

More Related