Sunday, November 14, 2010

Types of Magnetic Storage Devices of a Computer

Hard Drive Storage Device
Hard drives are the most popular storage subsystem in the computers. Hard drives are responsible for storing persistent info on a computer and due to its persistency it has been considered as the most important computer storage system sold in the market.
Hard Drive 
Magnetic Tape Storage Device

A magnetic tape storage device contains a plastic tape that is coated with magnetic material, which records characters in form of combinations of points on tracks parallel to longitudinal axis of tape. These tapes are sequential media. There is a problem with magnetic tapes because every time access to certain information becomes necessary to read all data that precedes it resulting in loss of time.
Magnetic tape storage device
Magnetic Drum Storage Device

Magnetic drum storage device contains either a hollow cylinder or a solid cylinder, which rotate at a consistent velocity. These cylinders are covered with magnetic material that is capable of retaining information, which is recorded and read by a head whose arm moves in the direction of the axis of rotation of the drum. In magnetic drum, access to information is direct and not in a sequential pattern like magnetic tapes.
Magnetic drum storage device by IBM 
Floppy disk or Diskette Storage Device
A diskette or a floppy disk is a flexible plastic disk covered by magnetic material, which allows reading and recording of limited data stored on it. A floppy disk is thin and flexible enclosed in a rectangular or square thin shell of plastic. These disks are currently out of fashion. They are usually sized around 3½ to 5¼ inches and are still used in personal computers.
So above were the four types of magnetic storage devices of a computer system. In my next article, I will share some info on Six Types of Optical Storage Devices of a Computer, which will help you in understanding them before buying them.
Floppy disks 

1 comment:

  1. hi..Im student from Informatics engineering, this article is very informative, thanks for sharing :)