1. Storage Jessica Vella Lauren Willey

2. Storage Storage is the ability to maintain data within computing and digital technology systems Data can be stored temporarily or permanently

3. Importance of Storage Ability to access information anywhere and anytime Easily share information with others Maintain huge libraries of documents, videos, music, pictures, and other digital information in a device no longer than a thumb

4. Storage Device Hardware that stores and retrieves data Storage media is the material on which the data is stored RAM, or Random Access Memory, is considered primary storage because it is the main storage for data being processed

5. RAM: What it is & Why it Matters Temporary memory that stores bytes of data and program instructions for the processor to access It is the primary storage area in a computer It is a crucial role in computer systems and contributes to a computer’s performance

6. RAM: Key Information Data flows back and forth between the CPU (Central Processing Unit) and the RAM across the front side bus SIMM is a Single In-line Memory Module, a set of tips grouped together on a circuit board Also, a DIMM is a Dual In-line Memory Module

7. Video Memory: What and Why Stores image data for a computer display in order to speed the processing and display of video and graphics images It provides important capabilities for today’s graphics-intensive computer systems Current computer games require high-capacity video memory and sophisticated graphics support to provide a realistic graphics environment

8. Video Memory: Key Information Acts as a buffer or intermediate storage area between the microprocessor and the display Images are first read by the processor from RAM and then written to video memory before they are sent to the display

9. ROM: What and Why Read-Only Memory (ROM) provides permanent storage for data and instructions that do not change ROM is firmware, which are programs and data from the computer manufacturer ROM has codes to start the computer

10. ROM: Key Information ROM stores data using circuits with states that are fixed If the power is removed, data is not lost BIOS, the basic input/output system, stores information about hardware configuration and the boot program (instructions needed to start up a computer) Flash BIOS are BIOS that have been recorded on a flash memory chip instead of a ROM chip, this still stores data permanently but is able to be updated when new revisions are availalbe

11. Magnetic Storage: What and Why Storage technology that uses the magnetic properties of iron oxide particles to store bits and bytes more permanently than RAM Uses magnetic properties instead of electric charges On a RAM, data is temporarily available only while the computer is powered on

12. Magnetic Storage: Key Information A surface is coated with a layer of particles that are organized into addressable regions Two types of media use magnetic storage: Disks: thin steel platters, the computer can go directly to the desired piece of data by positioning the read/write head over the proper track of the revolving disk Tapes: used to store and back up large quantities of data, sequential access storage medium, less expensive than disk storage but slower, ideal for large amounts of data in a set order

13. Optical Storage: What and Why Stores bits by using an optical laser to burn pits into the surface of a highly reflective disc. (pit = 0, no pit =1) Examples: CDs, DVDs, and Blu-ray discs Provides an extremely portable storage medium for quantities of data up to several gigabytes Ideal for storing music, movies, photos, software, and data for mobile access and sharing

14. Optical Storage: Key Information Burning is the process of writing to an optical disc R-discs are recordable, RW-discs are rewritable and can be rewritten numerous times like a hard drive CD: compact disc read-only memory, stores up to 700MB of data, cannot be modified DVD: digital video disc read-only memory, stores more than 4.7GB of data, can store entire digitized motion picture unlike CD Blu-ray: shorter wavelength of blue lights to read and write small pits for higher capacity and high definition

15. Solid-State Storage: What and Why Device that stores data using solid-state electronics such as transistors but does not require any moving mechanical parts Hard disk drives have slow data access rates, optical discs have limited storage capacity and slow to write to, but solid-state storage offers fast access times because it has no moving parts Increases in capacity each year, soon will be able to catch up to hard drives in capacity

16. Solid-State Storage: Key Information Flash memory is a form of solid-state storage that updates the data it holds in large blocks, and requires no moving parts to read and write data Flash memory card is a small chip encased in a plastic housing that stores data permanently without the need for power, can be easily modified and reprogrammed Flash drive (USB drive)- small flash memory module that plugs into the USB port of a PC to provide convenient, portable, high-capacity storage USB is a Universal Serial Bus and allows a wide array of devices to connect to a computer through a common port

17. Cloud Storage: What and Why Storing data files over the Internet (cloud) using Web-based services instead of one’s computer Allows users to take advantage of the internet for data storage Data can be stored on Internet servers and accessed from any Internet-connected device Reduces data redundancy by allowing one copy of a file to be accessed from multiple devices instead of multiple copies on the device itself

18. Cloud Storage: Key Information People are using cloud storage everyday but are unaware of it Google Docs, Facebook, Youtube, and others are all examples of locations supporting cloud storage

19. Benefits and Disadvantages of Cloud Storage Benefits: Ability to access the data from any Internet-connected device through a Web browser Ideal for sharing files with others for distribution or collaborative purposes Providers are addressing issues to work on improvements of cloud storage for the future Disadvantages: Cant access data without internet access Requires trust in the service provider

20. CREDITS Storage: Emerge with Computer Concepts, 2010 Cengage Learning http://content.delmar.cengage.com/CPReader/View/9781111471989/default.aspx?token=D987E85C20E8426A96CC2418B81C7B7F07B2CE0D471E961D9F302476FA96EED94DE7AB346048F71BA941662A9CAC2B218B2A8A4A1E996BFF&pid=441931&eISBN=9781111471989#7d656571-96eb-4f47-8b38-1059cb17e12d