What is Magnetic Devices ? What is Hard Disk Drive ?
Hi friends, previous posts mein Maine aapko approx sabhe primary storage devices ke bare me details mein bataya tha. Iss article mein primary storage devices mein se ek magnetic storage ke bare mein batyunga. Magnetic storage mein sabse popular Hard Disk Drive hain. Iss liye hard drive par focus rakhte hue Main sabse magnetic devices ko details mein describe karunga. Jaise - what is hard disk drive, what is floppy disk, advantages of hard drive etc...
What is Magnetic Devices ?
Magnetic devices ko computer mein as a secondary storage devices use kiya jata hain. In mein data binary(0 aur 1) form mein store hota hain. Magnetic devices mostly 4 types ke hote hain :-
- Hard Disk Drive
- Floppy Disk
- Magnetic Tape
- Zip Drives
In sabhe ki full information niche separated mil jayage.
Hard Disk Drive :-
Aaj ke time mein fast data transfer ke liye flash memory devices like - SSD etc... ka use kiya jata hain. Solid State Drive bhot he expensive hote hain aur capacity bhi kam hote hain. Iss liye aaj bhi mostly computers mein hard drives ka use kiya jata hain aur future mein bhi kiya jayaga jab tak ke flash memories ki prices kam nahi ho jo jate hain.
Hard disk drives, computer ki secondary storage devices mein se ek hain. HDD ka use data ko long term tak store karne ke liye kiya jata hain. HDD, data ko read, write, rewrite aur access kar sakte hain.
Hard drive mein ek magnetic disk lagi hote hain jo circul shape mein hote hain. Iss circular disk ko platter kaha jata hain. Platter ko magnetic elements jaise nikil, kobalt aur platinum se cover kiya jata hain. Hard drive ke isshe platter mein data tracks, spots aur sectors ke form form mein store hota hain. Iss platter ko ek motor se bhot fast speed mein ghuma jata hain. Iss platter ko kai choote - choote sectors, spots mein divided kiya jata hain aur In mein data as a North orientation ya South orientation mein stored hota hain.
Platter ke uper aur niche ek - ek head lage hote hain jin ka kaam data ko read aur write karna hota hain. Head, platter se data ko scan karta hain lakin yeah platter ko touch nahi karta hain. Head aur platters ke bech bhot kam distance hota hain. Aaj ke times ki hard drives mein yeah distance 5nm se 10 nm (nanometers) ka hota hain. Iss head se he data ko binary(0 aur 1) form mein platter mein store kiya jata hain. Aur data scan karne ke liye isshe head mein ek magnetic reader laga hota hain.
Hard disk drive he aise magnetic device hain jis mein itne jyada capacity mein data store kiya ja sakta hain. HDD ko aaj ke time mein internally aur externally dono tarah se use kiya ja sakta hain. Internally use mein iss ko computer mein as a secondary storage use kiya jata hain aur isshe mein sara data aur operating system stored hota hain. Externally use mein issko as a backup device use kiya jata hain matlab iss mein important files aur data ko safely rakha jata hain.
Advantages of Hard Disk Drive :-
- Hard drive mein bhot jyada amount mein capacity milte hain.
- Data access time bhot kam hota hain.
- Bhot he cheap aur easily available hote hain.
Disadvantages of Hard Disk Drive :-
- Mechnical device hain jis karan girne(drop) se corrupt ho sakte hain.
- Flash memories ke compare mein slow hote hain.
- Choote partical jaise - dust etc... andar jane se hard drive kharab ho sakte hain.
Floppy Disk :-
Floppy disk second most popular magnetic device hain jo bhot pehle use ke jate the. Aaj iss ka koi bhi use nahi karta hain. Floopy disks plastic se covered hote hain aur andar magnetic material hota hain. Starting time mein isske storage 80KB(kilobytes) the aur maximum storage 2.88MB(megabytes) tak hain. 1.44MB ki floppy disk sabse popular floppy disk the.
Floppy disk ko read aur write karne ke liye 'floppy disk driver' name ka device ki jaroorat hote the. Floppy disks mein bhot sari kami bhi hain :-
- Yeah aasani se kharab ho jate hain.
- Floppy disks ki capacity bhot kam hote hain.
Magnetic Tape :-
Magnetic tape lambi plastic ribbon ki tarah hote the jo magnetic material se coated hote the. Magnetic tapes mein data sequence mein store hota hain. In mein 185TB (tarabytes) tak ka data store kiya ja sakta hain but yeah bhot slow hote hain. Yeah bhot he cheap bhi hote hain.
Zip drives ko floppy drives ka updated version kaha ja sakta hain kyuki yeah bilkul floppy disks ki tarah hain. Zip drives bhi magnetic material se coated hote hain aur plastic se covered hote hain. Zip drives mein 750MB tak ka data store ho sakta hain. Inko read aur write karne ke liye separated zip writer device ki jarooat hote hain.
Other Posts :-
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