Hard Disk

By Charlotte Long

What is a Hard Disk? And Facts!

It is a data storage device. It is used for storing and receiving data using rotating disks called platters coated with magnetic material.

It stores the data permanently. Also it retains its data even when powered off. The casing of the hard disk is air tight so nothing can get in or out! Hard disks are more faster than floppy disks.

Hard drive consists of the following components: The head actuator, read/write actuator arm, read/write head, spindle and platter. As seen below.

Big image

What does it look like?

Ever wondered how a hard disk works?

This video will answer that.

Video: 5:03

Hard Disk Working | How does a hard disk work | Hard Drive

Different Functions.


External and Internal Hard Drives

Most hard drives are internal hard drives, but many people use external hard drives to back up their data on their computer and expand the amount of space available to them. External drives are usually stored in an enclosure that helps protect the drive.