Hard Disk Drive (HDD)

An HDD uses magnetism, which allows you to store data on a rotating platter. It has a read/write head that floats above the spinning platter for Reading and Writing of the data. The faster the platter spins, the quicker an HDD can perform. HDD also consists of an I/O controller and firmware, which tells the hardware what to do and communicates with the remaining system.

Components of Hard Disk Drive

  1. Platters

  2. Spindle Motor

  3. Pivot

  4. IDE Connector

  5. VCM actuator

  6. Base Plate

  7. Read/write head


  • It provides a large storage capacity.

  • The stored items are not lost, even if the computer is shut down.

  • It is fixed inside the computer so it can’t be lost.

  • Computers can communicate with them easily.

  • It can store data like text documents, images, videos, etc.

  • HDD device can store operating system files and software related files.

  • It sizes very small, and it is portable in use.

  • They are cheaper compared to SSD.


  • If hard disk crashes, the computer will not work.

  • You will lose your important data if the HDD drive crashes/ damages.

  • In the case of hard disk failure, it is difficult to perform the data recovery.

  • Regular “head” can crash, which damages the surface of the disk.

  • The hard disk is fixed inside the computer, so you can’t transfer to another computer.

Solid State Drive (SSD)