What is a Hard Disk Drive (HDD)?

What is a Hard Disk DriveEverything You Need to Know About Computer Hard Drives.

A Hard Disk also called a disk drive is a Data storage device on a computer or laptop.

It stores and retrieves digital information through rapid rotating disks called platters coated with magnetic material.

In a computer, the operating system and computer files are all on the hard drive.

HDD is categorized into two types we have:

  1. Internal Hard Drives.
  2. External Hard Drives.

Internal Hard Drives – This is a storage drive that is located inside a computer system.

External Hard Drives – This is a portable storage drive that can be carried with you. It is accessed by plugging it into the USB Port.

Types of External & Internal hard drives.

There are two types of  Internal Hard Drives classified into HDDs and SSDs.

HDD – Hard Disk Drive is Made of magnetic discs that spin very fast and a head that writes and retrieves information from the discs.

This is how it looks like

Hard Disk Drive image

SSD – Solid State Drives: These are drives that store data in memory chips. They come in small capacities and are expensive.

This is how it looks like

Solid State Drives

External drives.

They are classified into two form factors. Those that contain 2.5” magnetic drives and those that contain 3.5 magnetic drives.

The 2.5 magnetic drives are small and they are powered through the port they are connected to.

See picture below.

external hard drives

They connect using USB 2.0 (480 Mbps) or USB 3.0 (5 Gbps).

3.5 magnetic drives contain the same chip as the 2.5 ones but they have a power supply.

See picture below

3.5 magnet drives

The above magnetic drives have big discs that use more power than the normal port can supply.

Because of that, these hard drives need external power supplies.

Popular Hard Disk Drive Manufacturers.
  • Seagate.
  • Western Digital.
  • Hitachi
Continue Reading About Hard Drives.

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save

Save