1 / 29

Storage

Chapter 6. Storage. Overview. List Capacities Describe Hard Disk Characteristics Explain Cloud Storage Advantages Differentiate Between CDs & DVDs Explain Miniature Storage Use Identify the Uses for Tape. Storage. Holds Data, Instructions, & Information For Future Use. Capacity.

lala
Download Presentation

Storage

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. Chapter 6 Storage

  2. Overview • List Capacities • Describe Hard Disk Characteristics • Explain Cloud Storage Advantages • Differentiate Between CDs & DVDs • Explain Miniature Storage Use • Identify the Uses for Tape

  3. Storage • Holds Data, Instructions, & Information • For Future Use

  4. Capacity • Number of Bytes Medium can Hold • Average Fortune 1000 Capacity is 1PB computerworld.com 3/07

  5. Volatility • Storage is Non-volatile • Contents Retained when Power is Off • Device • Reading • Transfer Item from Storage Media to Memory • Writing • Transfer Item from Memory to Storage Media • Media • Physical Material • Stores Data, Instructions, & Information

  6. Disk References • A: — Always Primary Floppy Drive • B: — Secondary Floppy If It Exists • C: — Always Primary Hard Drive • D:, E:, F:, Etc. — Next Available Drive • Hard drive • CD-ROM • DVD • USB • Network

  7. Access Time • Time to Locate & Read Data on Media • Time to Deliver Data from RAM to CPU

  8. Hard Disk • Main Storage for System Unit • Internal • Consists of Several Inflexible Platters • Enclosed in Airtight, Sealed Case • Uses Magnetic Particles to Represent Data

  9. Hard Disk • Mechanics

  10. Hard Disk • Formatting • Prepares Disk for Reading & Writing

  11. Hard Disk • Formatting • Track • Circular Band • Sector • Pie-shaped • Cluster • Group of Sectors • Cylinder • Single Track Through All Platters

  12. Hard Disk • Head Crash • Spinning Creates Air Cushion • Floats Read / Write Head Above Platter • Crash • Head Touches Platter Surface • Clearance = Two-millionths of an Inch

  13. Hard Disk • External • Freestanding • Removable • Insert & Remove • Miniature • Used to Back Up or Transfer Files

  14. Cloud • Internet Service • Provides Storage to Computer Users • Benefits • Access Files From Any Computer • Allow Others to Access Their Files • View Time-critical Data Immediately • Store Offsite Backups

  15. Cloud • Examples • Digital Photos • Flickr, Picasa • Digital Videos • YouTube • SocNet Content • Facebook, MySpace • Email • Gmail, Hotmail, Yahoo Mail

  16. Optical Disk • Flat, Round, Portable Disc • Made of Metal, Plastic, Lacquer • Stores • Software • Data • Digital Photos • Movies • Music

  17. Optical Disk • Mechanics

  18. Optical Disk • CD (Compact Disc) • CD-ROM • Cannot Erase or Modify Contents • CD-R (Recordable) • Cannot Erase Contents Once Written • CD-RW (Rewritable) • Can be Erased • Stores About 700 MB • Writing Requires Burner & Software

  19. Optical Disk • DVD (Digital Video Disc) • DVD Drive & Software Required • High Capacity CD • Used for Movies, Music, Software • 12.5MB per Frame • 24 Frames per Second • 3+ GB per Movie Compressed

  20. Optical Disk • DVD • DVD-ROM • Cannot Erase or Modify Contents • DVD-R & DVD+R • Recordable • DVD-RW, DVD+RW, & DVD-RAM • Rewritable

  21. Optical Disk • DVD • Storage • Two Layers of Pits Can be Used • Lower Layer is Semitransparent • Laser Can Read Through it to Upper Layer

  22. Flash • Solid State Media • Contain No Moving Parts • Solid State Drive (SSD) Benefits • Faster Access Time • Faster Transfer Rates • Generate Less Heat • Consume Less Power • Last Longer

  23. Flash • Types

  24. Flash • Uses

  25. Flash • USB Drive • Plugs into USB Port • ExpressCard Module • Developed by PCMCIA • Used in Notebooks

  26. Tape • Magnetically Coated Plastic Ribbon • Stores Large Amounts of Data • Low Cost • Used for Backup Purposes • Storage • Sequential Access • Reads / Writes Data Consecutively • Similar to Audio Tape

  27. Other Storage • Magnetic Stripe Card • Contains Mag Stripe That Stores Data • Smart Card • Stores Data On Microprocessor • Embedded In Card • Prepaid Dollar Amounts • Updated When Card is Used • Healthcare Information • Tracking Information

  28. Other Storage • Microfilm • 100-215-foot Roll of Film • Microfiche • Small Sheet of Film • Usually 4” x 6” • Store Microscopic Images of Docs

  29. Media Life Expectancies

More Related