CD-ROM, CD-R DVD, (By Shujaat Abbas)
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This document discusses different types of storage devices. It begins by explaining that storage devices are used to store data even when a computer is turned off. It then provides details on various storage media like audio cassettes, video cassettes, VCRs, floppy disks, CDs, DVDs, and USB drives. For CDs and DVDs specifically, it describes their structure, read/write speeds, storage capacities, advantages like portability and large storage, and disadvantages like slow writing speeds. The document emphasizes that storage devices allow easy transfer of data and files between computers.
CD-ROM, CD-R DVD, (By Shujaat Abbas)
- 1. CD-ROM, CD-R, DVDCD-ROM, CD-R, DVD email: shujatabbas9@gmail.com FB/syedshujaatabbaszaidi@fb.com
- 3. Storage Devices • The storage devices store data –even when the computer is turned off. • It is used to keep important data and files which are of regular use on permanent basis.
- 6. VCRVCR
- 8. Floppy DiskFloppy Disk Floppy Disk –is a removable disk that everyone is familiar with. Since it has a small capacity, it is typically used to store documents so that they can be used on more than one computer.
- 10. CD A audioCD A audioCD A audioCD A audio
- 11. Video CDVideo CDVideo CDVideo CD
- 12. CD Structure • A CD is flat, round, portable metal disc, which is coated with a thin metal or plastic. • It is usually 0.75 inches in diameter.
- 14. Compact Disc - read only memory (write once) Data is encoded and read optically with a laser Can store around 600 and 700 MB data Compact Disc - read only memory (write once) Data is encoded and read optically with a laser Can store around 600 and 700 MB data
- 15. :-Compact Disc read-only memory is a Compact Disc that contains data accessible by a computer. •Firstly the Compact Disc format was designed for music storage and playback, •Later the format was adapted to hold any form of binary data. CD-ROM
- 16. •CD-ROM are popularly used to distribute computer Software, including games and Multimedia applications, though any data can be stored (up to the capacity limit of a disc). Some CDs hold both computer data and audio with the latter capable of being played on a CD player, whilst data (such as software or digital video) is only usable on a computer (such as PC CD-ROMs. These are called Enhanced CDs.
- 17. Reading Speed • Reading speed is measured in kB/s • Reading speed determines the transfer of data in one second. • 1× or 1-speed which gives a data transfer rate of 150 kB/s in the most common data format.
- 18. Advantages of CD-ROM • Large storage space • Compact and light • Can be manufactured on a large scale 20
- 19. Disadvantage Of CD-ROM • Slow Writing speed • Not easily re-writable • Cost Concerns 21
- 20. Summary • Compact Disk is a type of optical storage. • It holds data through physical marks. • Its is played in a CD-Player, and is read at different speeds. • Files system is required to write data on CD by different methods. • CDs are compact storage devices that can be moved from on place to another easily.
- 21. CD-Room
- 22. CD-R
- 23. CD-RW
- 25. DVDs (Digital Versatile Disc or Digital Video Disc) DVD, is an optical disc storage media format, and was invented in 1995. Its main uses are video and data storage. DVDs are of the same dimensions as compact discs (CDs), but store more than six times as much data. DVD, is an optical disc storage media format, and was invented in 1995. Its main uses are video and data storage. DVDs are of the same dimensions as compact discs (CDs), but store more than six times as much data.
- 26. DVD-RDVD-R
- 27. DVD-RWDVD-RW
- 28. DVD-ROOMDVD-ROOM
- 29. Development day by dayDevelopment day by day
- 30. USB (Universal serial Bus)USB (Universal serial Bus)
- 31. USB 2.0 V/S 3.0USB 2.0 V/S 3.0
- 33. Need of ThinkingNeed of Thinking