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1. Note:- Don’t get Bored

2. AMAN
MOHAMMAD ATIF

3. STORAGE DEVICE

4. 1. Introduction
2. Types of Storage Device
3. Primary Storage Device
4. Types of Primary Storage Device
5. Secondary Storage Device
6. Types of Secondary Storage Device

5. 1. Hardware device
2. Holds information or store data
3. Process data or information

6. There are mainly two types :-
1. Primary Storage Device
2. Secondary Storage Device

7. 1. Temporary Storage Device,
2. Volatile in most cases,
3. Looses data when power is shut off…

8. There are mainly three types :-
1. RAM
2. ROM
3. CACHE MEMORY..

9. 1. Random Access Memory
2. An integrated circuit made up of millions of
transistor and capacitor.
3. Volatile
4. Two type - Static RAM [SRAM]
Dynamic RAM [DRAM]

10. DRAM
1. Volatile memory
2. it requires stored information refreshed..
SRAM
1. Volatile memory
2. it never require refresh.

11. 1. Read only memory
2. non- volatile
3. Three types – PROM , EPROM , EEPROM..

12. PROM
Programmable Read Only Memory
EPROM
Erasable Programmable ROM
EEPROM
Electrically Erasable Programmable ROM

13. 1. Speed up the way application work
2. called microprocessor
3. fast memory
4. more expensive then RAM

14. 1. Permanent Storage Device,
2. non-volatile,
3. Doesn’t loose data when computer is turned
off..

15. 1. It is readable or writable
2. It refers movable and backup storage
3. It is permanent until changed by user..

16. There are mainly three types:-
1. Magnetic Disks
2. Optical Disks
3. Magnetic Tapes..

17. 1. Consist of magnetically coated disks
2. Two types:-
Hard Disk Drive,
Floppy Disk..

18. 1. Invented in 1950s.,
2. Non-volatile,
3. store data or information
4. Use thicker, metallic platters for storage
5. Large capacity

22. Floppy Disk
 Diskettes
 Flexible disk and Floppies
The plastic disk inside the diskette cover is flexible
 Portable storage media
 Floppy disk drives (FDD)
Disk surface to represent ones and zeroes.
 Characters are represented by positive + and –
charges using ASCII code.
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23.  High capacity
 Known as a floppy-disk cartridge
 Require special disk drives
 Three well known types
◦ Zip disks (Iomega)
100MB, 250MB, 750MB
◦ HiFD disks (Sony)
200MB, 720MB, read and store data on 1.44MB disk
◦ SuperDisks (Imation)
240MB, 120MB
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24. Zip disks (Iomega)
HiFD disks (Sony)
SuperDisks (Imation)
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25.  Compact
 Permanent storage
 Optical disk use reflected light.
 The 1s and 0s are represented by flat areas
called lands and bumpy areas called pits.
 Two common types
◦ CD ( 650 MB to 1GB)
◦ DVD ( 4.7 GB to 17 GB)
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26.  Optical format
 From 650 MB to 1 GB capacity
 Rotation speeds vary
It determines how fast data can be transferred from the CD
24X or 24- speed CD drive can transfer 3.6 MB per second.
 Types
◦ Read only: CD-ROM
◦ Write once: CD-R
◦ Rewriteable: CD-RW
◦ Picture CDs and Photo CDs
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27.  Digital Versatile Disk or Digital Video Disk
(DVD)
 Similar to CDs, but can store more data
 Types
◦ Read only
◦ Write once
◦ Rewritable
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28.  Solid-state storage
 Internet hard drives
 Magnetic tape
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29.  New standard in storage
 Blu-Ray
◦ New disks use blue laser light instead of the red
laser light used in traditional CD players
◦ Disks may ultimately hold
 Over 30GB on one-sided disks
 Over 50GB on two-sided disks
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30. for your Cooperation
Please ask the question very
frankly with us…

31. THE END
KHUDA HAFIZ