What is the magnetic disk in Hindi: We our’s computer Various types of storage devices are used to store data, such as hard disk, optical disk, SSD e.t.c. But even then there are many such storage devices about which we are not well aware. One of those storage devices is magnetic disk.
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What is Magnetic Disk
A magnetic disk, also known as a magnetic disk, is a secondary storage device that data Uses magnetization process to read, rewrite and access. The magnetic disk is covered with a magnetic coating, it stores data in the form of tracks, spots and sectors.
Magnetic disk costs less than RAM and can also store a large amount of data. But secondary memory Due to this, the data access rate is the main memory slower than .
The magnetic disk allows the data to be easily modified and deleted. In addition, the data in the magnetic disk Random Access can also be done. Magnetic disk is a non volatile memory.
Magnetic disk is also called magnetic disk in Hindi., Hard disks, zip disks and floppy disks are common examples of magnetic disks.
How Does Magnetic Disk Work?
A magnetic disc is a circular platter that looks like a CD. All platters range in diameter from 1.8 to 5.25 inches. The surface of each platter is divided into concentric circles called tracks. The outermost track is numbered 0 and the innermost track is the last track.
The track is further divided into sectors. The data on the disk is stored in sectors, the sector being the smallest unit that can be read or written. A disc has eight or more sectors per track.
The upper and lower surfaces of the platter are covered with magnetic material so that data can be stored on both sides of the platter. Magnetic discs are inserted into a magnetic disc drive for access, the drive has a read-write head that is attached to a disc arm, which moves the head. The disc arm can move in and out of the disc. The read-write head is an important part of the magnetic disk, which performs the task of reading and writing data.
Types of Magnetic Disk
There are mainly three types of magnetic discs –
- hard disk
- floppy disk
- zip disc
1 – Hard Disk
hard disk A computer has a secondary storage device in which data is stored. Hard disk is a type of magnetic disk, it is also non-volatile memory. The data in it is not lost even when the power supply is turned off.
Data remains in the hard disk until the user intentionally deletes it. A large amount of data can be stored in a hard disk. The storage capacity of the hard disk can be up to 20 TB. one to drive hard disk Driver Which is called HDD (Hard Disk Drive).
2 – Floppy Disk
floppy disk A secondary storage device is a type of magnetic disk used to store data. The storage capacity of floppy disk is very less. The storage capacity of a floppy disk depends on its size.
There are 3 different types of floppy disks available in the market, out of which the storage capacity of 8-inch floppy disk is 80KB, the capacity of 5.25-inch floppy disk is 800KB and the capacity of 3.5-inch floppy disk is 1.44 MB. Floppy disks are currently in use. Very little is done. The disk drive for Floppy Disk is called Floppy Driver.
3 – Zip Disk
zip disc There is also a secondary storage device which is a little advanced from the floppy disk. The storage capacity of Zip Disk ranges from 100 MB to 250 MB. Zip Drive is used to play Zip Disk. At present, the use of zip disk is also very less.
Features of Magnetic Disk
The following are the characteristics of a magnetic disc:
- Magnetic disk is an inexpensive storage device.
- Magnetic disk is a secondary storage device.
- Magnetic disk is a non-volatile memory.
- A large amount of data can be stored in a magnetic disk.
- Magnetic disk is suitable to read / write data frequently.
- A dust free environment is required to store the data in the magnetic disk.
- Data can be stored for a long time in a magnetic disk.
Advantages of Magnetic Disk
Magnetic discs have many advantages such as –
- Magnetic disk can store large amount of data.
- Magnetic disks have better data transfer rates than magnetic tapes.
- magnetic tape The chances of data corruption are very less in comparison to the disk.
- Since the magnetic disk is non volatile memory, the data stored in it is not destroyed even when the power supply is turned off.
- Data can also be accessed randomly in the magnetic disk, which reduces the time of data access.
- The data in the magnetic disk can also be updated as and when required.
- Magnetic disk costs less than RAM.
- Magnetic disk is an economical memory.
- Magnetic disk is a reliable memory.
Disadvantage of Magnetic Disk
There are also some disadvantages of magnetic disc which are as follows –
- Magnetic discs cost more than magnetic tapes.
- A clean and dust free environment is required to store the data in the magnetic disk.
- Magnetic discs are less portable than magnetic tapes.
- There is a risk of loss of data in case of a head crash.
- Magnetic disk is not suitable for sequential access of data.
Difference Between Magnetic Disk and Optical Disk
Magnetic discs and optical discs both have secondary storage devices that are used to store data for a longer period of time. These two also have some similarities, but there are a lot of differences between the two discs.
The difference between magnetic disc and optical disc is explained in the table below –
|magnetic disc||Optical Disk|
|The media type used is multiple fixed disk.||The media type used is single removable disk.|
|Sample rate is low.||The sample rate is high.|
|Implementation is done to randomly access the data.||Implementation is done for streaming files.|
|Tracks are circular.||There are spiral or circular tracks.|
|One disc is used at a time.||Large scale replication is possible.|
|The data can be accessed randomly.||Data is accessed sequentially.|
Frequently asked questions about Magnetic Disk
Magnetic disk is a storage device.
Magnetic disk is an example of non volatile memory.
Examples of magnetic disks are hard disks, floppy disks.
Magnetic disk is a secondary memory device used to store data. Data can be stored permanently in a magnetic disk.
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