How many type of Storage Devices, Learn it here.

Type of Storage Devices

      Storage devices do the work of storing data, information etc. Computer data and programs are stored and kept for immediate and future use. The mediums in which they are stored can be divided into two parts-

  1. Primary Storage Media and
  2. Secondary Storage Media

      Data and programs are stored only temporarily in the primary storage medium. Can Computer memory is an example of a primary storage medium. Secondary storage media include those devices in which data, programs and processes produce results immediately and repeatedly in the future Permanently stored and kept safe for use.

Floppy Disk

      A floppy disk is a circular disk made of Mylar Plastic. On whose surface there is a coating of iron oxide (magnetic substance). It also has concentric tracks and sectors on both its surfaces like a hard disk. Data is stored in these tracks and sectors.

      To protect the floppy disk, it is kept in a plastic cover, which protects it from scratches etc. It has a part open in its case, so that the road write head can store or receive data on the disc. This part is called Access Window. There is a hole in the poppy disk and its cover which is called Index Hole. Whenever the hall comes under the Photo Sensor, it means that it has been located on the first sector.

Storage Device : Floppy Disk

      Some part is cut on one side of the floppy, which is called Write Protect Notch. It is used to protect data from being written or stored on the disk. When this slot is open, we can read and write data, but when it is closed with a sticker or tape, the data on the disk can only be read, not written.

      Floppy disk storage capacity is less. Only 1.44 MB of data can be stored in it. Puppy gets spoiled by keeping water in excess unit area. Reading aloud can also be done by touching a magnetic material. Therefore, there is a need to be very careful in their use.

Hard Disk

      In small computers like microcomputer and minicomputer, hard disk is taken in the ear for data storage, it is installed inside the system unit. Due to its excessive storage capacity, this storage device (Mass Storage Device) and because it is installed inside the system unit, it is also called Online Storage Device = 160GB SOO GB and (TH) is more popular today.

      A lot of the new is held permanently on the hard disk. Nirandar, Compiler, Assembler, Ekshagram, etc. are also stored on Hard disk.

Storage Device : Hard Disk

      A hard disk consists of a set of discs or disk platters made of aluminum or other metal. Each platter is coated with magnetic iron oxide. The platters have concentric tracks and sectors on both the surfaces. Data is stored in these tracks and sectors. All disc platters are threaded on a spindle.

      Each platter has a separate read/write head. All the read/write heads are mounted on the same arm in a shoulder-like structure. This arm is called the access arm. Each head moves to a suitable track on the surface of the rotating disc. Thus the process of reading/writing data is straightforward. Each data location has an address or disk address which consists of surface number, track number and sector number. With the help of this access arm searches the data.

      Hard disk and read right hand are all sealed in an air-tight chamber so that dust cannot enter there. This chamber looks like a lunch box from outside.

CD ROM or Compact Disk

      ROM is an optical storage device in which Data can only be read. The term ROM is short for Read Only Memory. CD. Data is read and written in ROM with the help of laser rays. This disc is made of a resin-like material called polycarbonate. Its surface is coated with aluminum compounds, which gives it the property of reflecting light. In the process of data collection, CD A high-intensity (25 mW) laser beam is applied to the reflective surface of the follicle, causing a microscopic pit. This pit is a pointer to 1 bit. Where the pit is not on the surface, it is a 10-bit pointer. Such a pitless place is called land.

Storage Device : CD Rom and CD

      A low intensity (5 mW) laser beam is used to read the data from the disk in the ROM. The reflected laser rays are detected by the photodetector. There is no difference in the intensity of the reflected ray from the penis, but the reflected ray from the pit spreads in many directions, due to which the presence of the pit is known. This difference in reflected light is converted into an electrical potential (and bit) that is known as data.

      Tracks are also used for data storage in CB ROM. These tracks are extended in sectors, but the tracks of CD ROM are not closed like floppy disk or hard disk, but they are continuous, whose width is about five kilometers. are arranged in a spiral manner. CD jam has higher parity. a cb RAM (can be used with 50MB of data. Its transfer rate is also high. Sadiram is used for media users. Nowadays C ROM is also used a lot.

Digital Video-Disk

      Digital Video Discs (DVDs) look exactly like CDs. They sound similar but there are many differences between the two. DVD can store 75 times more data than CD. A typical DVD has a storage capacity of about 47 GB. Some DVDs can store up to 17 GB of data. The diameter of a DVD is 47 inches.

      Like a CD, data on a DVD is stored in the form of tracks, which are divided into several sectors. But in DVD, the size of the pits is much smaller and the distance between the tracks is also very less as compared to CD. As a result, the capacity of a DVD increases more than that of a CD. Another feature of a DVD is that it can record more than one record by changing the focus of one layer much more than by changing the focus of the record layer. The data in DVD is written in W addresses, further increasing its storage capacity.

Storage Device : DVD

      Its age is also at least ten years like a CD. DVD Drive is required to read and write DVD. The DVD drive can also drive and write CDs. Environmental factors like humidity, temperature do not affect DVD like CD but it is necessary to protect it from scratches. Scratches can render a DVD completely useless. Dust also interferes with the reading of DVDs. So it should always be kept in cover.

Flash Drive / Pen Drive

      It is the latest device for data transfer and storage with amazing features. So far popular devices for data transfer and storage such as poppy seeds, disks, CDs, etc. each have their own problems, especially since they cannot be used in computers with different peripheral devices. Whereas Intelligent Stick can be used with any computer.

Storage Device : Pen Drive

      The size of the USB port of this computer is so small that it can be carried in a pocket or purse. They have their mind.

Zip Drive

      Magnetic Media is the second wonder of the world after Zip Drive Floppy Disk. CD. Before Writer, Zip Drive was the most popular backup tool. Zip drives are much cheaper than CD writers. In this, the device used for data storage is called Zip Cartridge. Zip cartridge is convenient to carry and more reliable. About 100 MB of data can be stored in Zip Cartridge, its size is 4 square inches. And the thickness is almost twice that of floppy. One problem with Zip drives is that currently available operating systems do not support Zip drives.

Storage Device Zip Drive


      Blu-ray Disc is an optical disc medium like CD and DVD. Its physical characteristics are similar to those of standard DVDs and CDs. Blu-ray Discs have a storage capacity of 25 GB per single layer and 50 GB dual layer. A blue violet laser is used to read Blu-ray discs. That is why it is named Blu-ray Disc. Its main use is to store high definition video, video games and other data.

Storage Device Blu-Ray Disk

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