Secondary Storage Device or Memory : Now the computer has its influence in every place because it can retain a lot of information and it is possible only for Computer Secondary Device. Computer-secondary devices and memory can be divided into two parts, magnetic media and optical media.
Secondary Storage Device or Memory | Optical & Magnetic Media
The main objective of secondary memory is to store a large amount of information. Another advantage of using secondary memory is that there is no loss of information when the power connection is interrupted.
 |
| Secondary storage device or Memory |
All the data or information on a computer are stored in secondary memory, when a program is run, then that file comes in RAM. All of your audio, video, software etc. are stored in the form of file, and those files have some extension :
- Text File ➥ .txt
- Image File ➥ .jpg, .png
- Audio File ➥ .mp3
- Video File ➥ .mp4
- Software ➥ .exe
 |
| Secondary memory (Hard Disk) |
Classification of Secondary Storage Device
Secondary memory are divide into two parts :
- Magnetic Media
- Optical Media
Magnetic media: Magnetic oxide or any other type of
laminated plastered plastic or metallic sheet in which a large amount of
information can be read or read, in magnetic media.
Examples of magnetic media are hard disks, floppy disks.
Examples of magnetic media are hard disks, floppy disks.
 |
| Magnetic Media |
- Hard Disk : Computer are store huge amount of data, it is only possible for Hard disk. Discs are made of many thin aluminum alloy metal, called platter. Now a day computer hard disk are store data around 500 GB to 2 TB (in general). To protect the thin metal round disks, hard disk is placed inside a metal jacket and placed inside the computer, so it is called permanent or fixed disk.
- Floppy Disk : The floppy disk is a thin plastic sheet coated with ferric oxide on thin and flexible plastic pet called Mylar.The disc is kept in a thin plastic jacket for the destruction of the dirt. Now a days one floppy disk can store 1.44 Mb data and it's size is 3.5 inch.
Optical media: In Optical media with special rays or the help of laser light, the information is
read or write directly.
Examples of Optical media are CD, DVD, Blue Ray Disk.
Examples of Optical media are CD, DVD, Blue Ray Disk.
 |
| Optical Media |
- CD (Compact Disk): The shape of the CD is like a round disc, made of polycarbonate plastics. The data is written with the help of laser rays, while the thin aluminum cover is covered. One CD can store data from 650 to 700 Mb. We currently use three types of CD's are CD-ROM, CD-R, CD-RW.
- DVD (Digital Versatile Disk): DVD's are also look like CD's. At present, a DVD can usually store up to 17 GB of data from 4.7 GB.
- Blue Ray Disk : Blue ray disc name comes in the name of the blue purple laser used on this disk. This Blue Ray Disk are read data using ray. Blue Ray Disk are capacity of 25 GB storage.
Thanks for watching.
Question Covered
➥ What is storage device ?
➥ How many types of Secondary memory is there in computer system ?
➥ Write a short note on Magnetic Media .
➥ Write a short note on Optical Media .
➥ Give some example of Magnetic Media and Optical Media .
To know more on different topic of COMPUTER visit dhide.blogspot.com
➤What is output Device ?
➥ How many types of Secondary memory is there in computer system ?
➥ Write a short note on Magnetic Media .
➥ Write a short note on Optical Media .
➥ Give some example of Magnetic Media and Optical Media .
To know more on different topic of COMPUTER visit dhide.blogspot.com
Post a Comment