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Storage Devices
Storage Devices
Storage Devices
Storage Devices
Storage Devices
Storage Devices
Storage Devices
Storage Devices
Storage Devices
Storage Devices
Storage Devices
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Storage Devices

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  • 1. O<br />ptical storage devices<br />Advantages :<br />Disadvantages :<br /><ul><li>With proper care, optical media can last a long time.
  • 2. When data is written to them, they cannot be reused. This is excellent for archiving because data is preserved permanently of being overwritten.
  • 3. Optical media are widely used on other platforms, including the PC.
  • 4. Optical media provide the capability to pinpoint a particular piece of data stored on it, independent of the other data on the volume .
  • 5. The write-once read-many (WORM) ,it excellent for archiving, but it also prevents you from being able to use that media again.
  • 6. The server uses software compression to write compressed data to your optical media. It need the long time to stroe more datas.</li></ul>Mai 10RP<br />
  • 7. CD-Rom<br />Typical size = 650mb<br />Advantages :<br /><ul><li>Data cannot Be erased – you cannot lose your data
  • 8. Easy to carry around
  • 9. Cheap to produce
  • 10. Can Be read By a DVD drive</li></ul>Disadvantages :<br /><ul><li>Fragile
  • 11. Can scratch easily – this effects the data when the laser reads it
  • 12. Slower to access than a hard drive</li></ul>Mai 10RP<br />
  • 13. DVD-ROM<br />Read Only Memory (Read Only)<br />Advantages :<br />Disadvantages :<br /><ul><li>Can only be used for reading.
  • 14. Movies you buy or rent are usually DVD-ROM.
  • 15. Although some discs can hold up to 17 GB of information.
  • 16. Can hold a minimum of 4.7 GB of movies, music, text, or images.
  • 17. Access rates for DVD ROMs range from 600 Kbps to 1.3 Mbps.
  • 18. Once the information is recorded onto a DVD ROM, it can’t be changed or altered.
  • 19. You may have trouble operating some programs with your DVD ROM drive.</li></ul>Mai 10RP<br />
  • 20. CD R/DVD R<br />Recordable (Only write one time)<br />DVD recordable<br />Advantages :<br />Disadvantages :<br /><ul><li>Can only be written with -R type drives.
  • 21. Can be read with -R or +R type drives.
  • 22. DVD+R
  • 23. 2 hours of video in SP mode or 4 hours in EP mode
  • 24. Can only be written with +R type drives.
  • 25. Can be read with -R or +R type drives.
  • 26. Data on a DVD-R cannot be changed</li></ul>Mai 10RP<br />
  • 27. CDRW/DVDRW<br />DVD-rewritable<br />Compact Disc Re-Writable<br />Advantages :<br />Disadvantages :<br /><ul><li>The data burned on a CD-RW cannot be changed
  • 28. you have to completely erase a CD-RW every time you want to change the files or add new data
  • 29. they don't store data reliably for as long as CD-Rs do.
  • 30. A CD-RW can be written to multiple times.
  • 31. CD-RWs a good choice for making frequent backups.</li></ul>Mai 10RP<br />
  • 32. DVD RAM<br />DVD- Random Access Memory<br />Advantages :<br />Disadvantages :<br /><ul><li>Long life—  without physical damage
  • 33. Can be rewritten over 100,000 times
  • 34. Disc defect management designed to safeguard data.
  • 35. DVD-burning software may not be required 
  • 36. Less compatibility than DVD+RW and DVD-RW
  • 37. 12x media is not reportedly available in Europe.
  • 38. DVD-RAM media have always been more expensive than other types of DVD.</li></ul>Mai 10RP<br />
  • 39. HD DVD<br />High-Definition/Density DVD<br />Advantages :<br />Disadvantages :<br /><ul><li>high-density optical disc format for storing data
  • 40. HD DVD was envisaged to be the successor to the standard DVD format.
  • 41. maximum capacity: 15 GB per layer
  • 42. it’s hard to deny that the HD-DVD player is a great device for the price
  • 43. It’s expensive </li></ul>Mai 10RP<br />
  • 44. Blu-ray<br />is an optical discstorage medium designed to supersede the standard DVD format.<br />Advantages :<br />Disadvantages :<br /><ul><li>It’s main uses are for storing high-definition video, PlayStation 3 video games.
  • 45. 25 GB per single layered, and 50 GB per dual layered disc
  • 46. a standard DVD uses a 650 nanometer red laser, Blu-ray uses a shorter wavelength
  • 47. six times more data storage than a DVD
  • 48. It’s too expensive.
  • 49. Blu-ray attempted to woo consumers with awfully big pockets by presenting them
  • 50. Blu-ray disc can't hold much more than four or five hours of high definition content.</li></ul>Mai 10RP<br />
  • 51. Solid state backing storage<br />Disadvantages :<br />Advantages :<br /><ul><li>Smallest form of memory
  • 52. More expensive than</li></ul>other forms but can be easily written to and updated.<br /><ul><li>used as removable storage</li></ul>More robust than other forms of storage.<br />Mai 10RP<br />
  • 53. Memory sticks<br />Pen drives<br />Advantages :<br />Disadvantages :<br /><ul><li> It can be lost.
  • 54. It can be broken, if we dropped.
  • 55. It can lost the information easily.
  • 56. Can store up to many Gb.
  • 57. Used to transport files and backup</li></ul>data from computer to computer.<br />Mai 10RP<br />
  • 58. Flash memory <br />cards<br />Advantages :<br />Disadvantages :<br /><ul><li>Used in digital cameras, palmtops, mobile phones, MP3</li></ul>players.<br />Mai 10RP<br /><ul><li>It can be lost and broken</li>

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