Normally, we use magnetic disks for following purpose:-
For random data processing applications.
As a shared, on-line secondary storage device. We often use Winchester disk packs for this purpose.
As a backup device for off-line data storage. We often use Zip disks and disk packs for this purpose.
Archiving of occasionally used data. We often use zip disk Packs for this purpose.
Transferring of data and programs between two unlinked computers. We often Zip disks for this purpose.
Magnetic Disk contains circular disk made of metal or plastic. Both side of disk is usually used for storing data. The disk is coated by magnetic oxide. The disk is divided into multiple concentric circles known as track and tracks are divided into sectors in which data are stored.