Korneliusz Derda
Korneliusz Derda voted up Natalie Holeman's answer

I may be wrong but I disagree with Neha Agrawal.

The parts of a disk drive are:

1.  Power source

2.  Platter (where data is written to/read from)

3.  Read/write heads (performs actual write, for hard disks this is by a tiny magnet to change magnetic characteristics of a location to write or sense magnetic polarization to read; for … Read more

Korneliusz Derda
Korneliusz Derda voted up Neha Agrawal's answer
The main function of a hard disk is storage. It is where all your files and data can be stored on a permanent basis and you can access this data anytime. A hard disk can store huge amounts of data files in all formats. All desktops, laptops, PDAs, tablets, and even cell phones have a … Read more