Disk Drive

A hard disk drive is a memory storage device.

The disk is divided into tracks. Each track is further divided into sectors. Sectors are 512 bytes apiece. 1 byte is 8 bits.

The CPU and motherboard instructs the “Read/Write Head” where to provide an electrical charge to a “sector” on the platter. Each bit’s magnetic charge translates to a binary 1 or 0 of data.


  1. Blogs.umass.edu. 2021. Hard Drives: How Do They Work? – Techbytes. [online] Available at: <https://blogs.umass.edu/Techbytes/2017/04/04/hard-drives-how-do-they-work/> [Accessed 8 October 2021].
  2. GeeksforGeeks. 2021. Hard Disk Drive (HDD) Secondary memory – GeeksforGeeks. [online] Available at: <https://www.geeksforgeeks.org/hard-disk-drive-hdd-secondary-memory/> [Accessed 8 October 2021].
  3. pctechguide.com. 2021. Hard disk (hard drive) format – the tracks and sectors of the hard disk. [online] Available at: <https://www.pctechguide.com/hard-disks/hard-disk-hard-drive-format-the-tracks-and-sectors-of-the-hard-disk> [Accessed 8 October 2021].

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