Computer Hard Disk Drive

(H.D.D.) Hard Disk Drive

H.D.D. (Hard Disk Drive) is a data storage device used for storing and retrieving digital information using rotating disks coated with magnetic material. All programs of a computer are installed in hard disk. It is a fixed disk.

 

Hard Disk Parts

It consists of a spindle that holds non-magnetic flat circular disks, called platters, which hold the recorded data. Each platter requires two read/write heads, that are used to write and read information from a platter.

All the read/write heads are attached to a single access arm so that they cannot move independently.

 

The information in recorded in brands.

Each band of information is called a track. Each platter has the same number of tracks and a track location that cuts across all platters is called a Cylinder.

The tracks are divided into pie shaped sections known as sectors.

 

H.D.D. Stands for Hard Disk Drive