1 / 24

Computer Performance & Storage Devices

Computer Performance & Storage Devices. Computer Technology Day 2 Notes. Computer performance. Windows Boot Processing Screen. 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. Purpose

hieu
Download Presentation

Computer Performance & 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 Day 2 Notes

  2. Computer performance

  3. Windows Boot Processing Screen 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. • Purpose • Runs a diagnostic test to make sure everything is working • Loading the operating system, so the computer can carry out basic operations MAC Boot Processing Screen

  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

  5. Circuits Close up of a circuit • 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

  6. Silicon Chips • Silicon is melted sand • What the circuits are embedded into to keep them together. Circuit Silicon Chip

  7. Megahertz (mHz) • A measure used to describe the speed of the system clock. • A megahertz is equal to 1 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

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

  9. RAM vs. ROM (Memory) • Random Access Memory • The ability of a storage device to go directly to a specific storage location without having to search sequentially from a beginning location. • Very volatile (not dependable) • Cannot hold data when the power is off • Looses all data when power is lost • Read Only Memory • Drives can read data from disks, but cannot store new data on them. • One or more integrated circuits that contain permanent instructions that the computer uses during the boot process.

  10. Binary Number System{Base 2 Binary Code} • A method for representing letters or numbers using only two digits, 0 and 1 • Bit • Each 0 or 1 • Byte • 8 bits Bit Bit Byte

  11. Memory Measurements

  12. Used to keep data when the power to the computer is turned off. Storage devices

  13. Medium/Media • Location where data is stored Medium/Media Locations C: F: E: K: T: Z: Medium/Media Locations D: P: Y:

  14. Hard Disk • Usually mounted inside the computer’s system unit. • Can store BILLIONS AND TRILLIONS of characters of data. • Stated in forms of bytes: • Megabytes, Gigabytes, Terabytes

  15. Magnetic Storage • Recording of data onto disks or tap by magnetizing particles of an oxide based surface coating. • A fairly permanent type of storage that can be modified.

  16. 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

  17. Floppy Disk Options • Formatted • Preparing the disk for use by the computer. • Write-protected • Setting the disk so that it can not be written to by the computer

  18. ZIP Disk 100 MB Zip Disk • Floppy disk technology manufactured by Iomega • Available in 100 MB and 250 MB versions ZIP Disk 250 MB ZIP Disk Drive

  19. Digital Audio Tape • Method of storing large amounts of data on tape using helical scan technology to write data at high densities across the tape at an angle.

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

  21. CD-ROM • “Compact-Disk-Read Only Memory” • Also called CD-R • CD-Recordable • Storage device that uses laser technology to read data that is permanently stored on compact disks • Cannot be used to write (burn) data to a disk Use a CD-R if you DO NOT want someone to have the ability to change the data on it.

  22. CD-RW • “Compact Disk–Read Write” • A storage device that reads data from CD’s and also can write (burn) data to CD’s • Similar to a CD-ROM, but has the ability to edit. Look for the “RW” if you want to be able to EDIT your CD

  23. 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. Stores more information than a CD-R or CD-RW

  24. Resources Parsons, June Jamrich, and Dan Oja. Computer Concepts. Boston: Course Technology-Thompson Learning, 2002.

More Related