Storage devices used in computers        http://improvec.blogspot.in/   1
Objective: On completion of this period, you would be able to know:The storage devices used in computers.              ht...
Recap: Why Cache Memory is used ?    Cache Memory is used to increase the speed of the computer.               http://imp...
Prerequisites:What is storage media? The physical components or materials on which data is stored called storage media.   ...
What are storage devices ? The hardware components that write data to,  and read it from, storage media are called  stora...
Categories of storage technologyThe two main categories of storage technologyused today are         Magnetic storage     ...
Magnetic storage  The primary types of magnetic storage are as  follows: Diskettes Hard disks (both fixed and removable)...
Magnetic storage (contd...) High capacity floppy disks Disk cartridges Magnetic tape                    http://improvec...
Magnetic storage (Contd...) Magnetic storage devices work by polarizing tiny  pieces of iron on the magnetic medium. Rea...
Diskettes Diskette drives, also known as floppy disk  drives, read & write to diskettes. Diskettes are used most often t...
Diskettes (contd) Diskettes are available in two sizes : 5.25 inch  and 3.5 inch. The 5.25 inch diskette is rarely used ...
Hard disksHard disk can store more data than diskettesbecause of their higher density media faster rotational speed and...
High capacity floppy disk High capacity floppy disk are becoming a  popular add- on for many computers. They offer capac...
Disk cartridges A disk in plastic case that is inserted into or  removed from the drive. The disk and the case  are often...
Magnetic tape Magnetic tape system offer slow data access. Because of their large capacities and low cost,  they are a p...
Optical storageThe primary types of optical storage are as follows: Compact Disk Read-Only Memory (CD - ROM). Digital Vi...
Optical storage (contd) CD - Recordable (CD-R) . CD - Rewritable (CD - RW). Photo CD.                 http://improvec.b...
CD-ROM CD-ROM uses the same technology as a music  CD does; a laser reads lands and pits on the  surface of the disk. St...
Digital Video Disk Read-Only Memory                 (DVD-ROM). DVD-ROM technology is a variation on standard  CD-ROM. DV...
CD - Recordable (CD-R) . CD-Recordable drive can be attached to a  computer as a regular peripheral device. CD-R allows ...
CD - Recordable (CD-R) (contd). After the information has been written into a part  of the CD, that information cannot be...
CD - Rewritable (CD-RW). CD-Rewritable drives , however, users can write  and overwrite data onto compact disks.         ...
Photo CD One popular form of recordable CD is Photo CD. Developed for storing digitized photographic  images on a CD Ma...
Photo CD (contd..) With a photo CD, you can continue to add  images until the disk is full. Written images cannot be era...
Summary:In this class, you have learnt about    different storage devices used in            computers.                  ...
Frequently Asked Questions1. List the storage devices.?2. Explain the primary magnetic storage devices   used in computers...
Quiz:1. Storage device which offer slow data access.      a. Magnetic tape      b. diskettesAnswer: a                  htt...
Contd..2. CD developed for storing digitized photographic  images is     a. CD-R     b. Photo CDAnswer: b                 ...
Contd..3. The high density medium capable of storing a  full length movie on a single disk is  a. DVD-ROM  b. CD-RWAnswer:...
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Storage devices used in cmp13to14

  1. 1. Storage devices used in computers http://improvec.blogspot.in/ 1
  2. 2. Objective: On completion of this period, you would be able to know:The storage devices used in computers. http://improvec.blogspot.in/ 2
  3. 3. Recap: Why Cache Memory is used ? Cache Memory is used to increase the speed of the computer. http://improvec.blogspot.in/ 3
  4. 4. Prerequisites:What is storage media? The physical components or materials on which data is stored called storage media. http://improvec.blogspot.in/ 4
  5. 5. What are storage devices ? The hardware components that write data to, and read it from, storage media are called storage devices.  Example: floppy disk http://improvec.blogspot.in/ 5
  6. 6. Categories of storage technologyThe two main categories of storage technologyused today are Magnetic storage Optical storage http://improvec.blogspot.in/ 6
  7. 7. Magnetic storage The primary types of magnetic storage are as follows: Diskettes Hard disks (both fixed and removable) http://improvec.blogspot.in/ 7
  8. 8. Magnetic storage (contd...) High capacity floppy disks Disk cartridges Magnetic tape http://improvec.blogspot.in/ 8
  9. 9. Magnetic storage (Contd...) Magnetic storage devices work by polarizing tiny pieces of iron on the magnetic medium. Read/write heads contain electromagnets that create magnetic charges on the medium. http://improvec.blogspot.in/ 9
  10. 10. Diskettes Diskette drives, also known as floppy disk drives, read & write to diskettes. Diskettes are used most often to transfer files between computers as a means for distributing software as a backup medium. http://improvec.blogspot.in/ 10
  11. 11. Diskettes (contd) Diskettes are available in two sizes : 5.25 inch and 3.5 inch. The 5.25 inch diskette is rarely used today. http://improvec.blogspot.in/ 11
  12. 12. Hard disksHard disk can store more data than diskettesbecause of their higher density media faster rotational speed and the tiny distance between the read/write head & the disk surface. http://improvec.blogspot.in/ 12
  13. 13. High capacity floppy disk High capacity floppy disk are becoming a popular add- on for many computers. They offer capacities up to 250MB and the same portability as standard floppy disks. http://improvec.blogspot.in/ 13
  14. 14. Disk cartridges A disk in plastic case that is inserted into or removed from the drive. The disk and the case are often called disk cartridge. Disk cartridges are like small removable hard disks and can store up to 2GB. http://improvec.blogspot.in/ 14
  15. 15. Magnetic tape Magnetic tape system offer slow data access. Because of their large capacities and low cost, they are a popular backup medium. http://improvec.blogspot.in/ 15
  16. 16. Optical storageThe primary types of optical storage are as follows: Compact Disk Read-Only Memory (CD - ROM). Digital Video Disk Read-Only Memory (DVD - ROM). http://improvec.blogspot.in/ 16
  17. 17. Optical storage (contd) CD - Recordable (CD-R) . CD - Rewritable (CD - RW). Photo CD. http://improvec.blogspot.in/ 17
  18. 18. CD-ROM CD-ROM uses the same technology as a music CD does; a laser reads lands and pits on the surface of the disk. Standard CD-ROM disks can store up to 650 MB. Once data is written to the disk, it cannot be changed. http://improvec.blogspot.in/ 18
  19. 19. Digital Video Disk Read-Only Memory (DVD-ROM). DVD-ROM technology is a variation on standard CD-ROM. DVD-ROM is a high density medium capable of storing a full length movie on a single disk DVD-ROM offers capacities up to 17 GB. http://improvec.blogspot.in/ 19
  20. 20. CD - Recordable (CD-R) . CD-Recordable drive can be attached to a computer as a regular peripheral device. CD-R allows you to create your own CD-ROM disks that can be read by any CD-ROM drive. http://improvec.blogspot.in/ 20
  21. 21. CD - Recordable (CD-R) (contd). After the information has been written into a part of the CD, that information cannot be changed. With most CD-R drives, however, you can continue to record information to other parts of the disk until it is full. http://improvec.blogspot.in/ 21
  22. 22. CD - Rewritable (CD-RW). CD-Rewritable drives , however, users can write and overwrite data onto compact disks. http://improvec.blogspot.in/ 22
  23. 23. Photo CD One popular form of recordable CD is Photo CD. Developed for storing digitized photographic images on a CD Many film developing devices now have photo CD drives that can store your photos and put them on a CD. http://improvec.blogspot.in/ 23
  24. 24. Photo CD (contd..) With a photo CD, you can continue to add images until the disk is full. Written images cannot be erased or changed. http://improvec.blogspot.in/ 24
  25. 25. Summary:In this class, you have learnt about  different storage devices used in computers. http://improvec.blogspot.in/ 25
  26. 26. Frequently Asked Questions1. List the storage devices.?2. Explain the primary magnetic storage devices used in computers?3. Explain the primary optical storage devices? http://improvec.blogspot.in/ 26
  27. 27. Quiz:1. Storage device which offer slow data access. a. Magnetic tape b. diskettesAnswer: a http://improvec.blogspot.in/ 27
  28. 28. Contd..2. CD developed for storing digitized photographic images is a. CD-R b. Photo CDAnswer: b http://improvec.blogspot.in/ 28
  29. 29. Contd..3. The high density medium capable of storing a full length movie on a single disk is a. DVD-ROM b. CD-RWAnswer: a http://improvec.blogspot.in/ 29
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