Explain in detail Magnetic Disks

Semester:-1

Unit:-4

Explain in detail Magnetic Disks
Ans:-
          A round plate on which data can be encoded. There are two basic types of disks: magnetic disks and optical disks.
            On magnetic disks, data is encoded as microscopic magnetized needles on the disk's surface. You can record and erase data on a magnetic disks any number of times, just as you can with a cassette tape. Magnetic disks come in a number of different froms:
Floppy Disk :
                       A typical 5 1/4 - inch Floppy disk can hold 360K or 1.2MB (megabytes). 3 1/2 - inch floppies normally store 720K, 1.2MB or 1.44MB of data.

Hard disk : 
                    Hard disks can store anywhere from 20MB to more than 200 GB. Hard disks are also from 10 to 100 times faster than Floppy disks.
Removable Cartridge :
                                        Removable Cartridge are hard disks encased in a metal or plastic Cartridge, so you can remove them just like a Floppy disks. Removable Cartridge are very fast , though usually not as fast as fixed hard disks.