Computer Harware

2nd Year ICT

Hard Drive/SSD

Hard Drive

A hard drive is the main storage site on a computer. On this applications, files and almost everything that need to be saved and then looked at again is stored. The hard drive is made up of the disk and the arm. The arm writes the code for the app/document onto the disk where it stays there permanently. When the document needs be used again, the arm reads the code from the disk and then brings it up on the monitor.

SSD

The SSD is the abbreviation for a Solid State Drive. The SSD is a smaller version of a hard drive but has no moving parts. SSD’s are put in devices where a hard drive would not fit for example a phone, IPad, Mac Book air. The size of the SSD though means that they are more complicated to build so they cost more than a conventional hard drive.

The SSD is the abbreviation for a Solid State Drive. The SSD is a smaller version of a hard drive but has no moving parts. SSD’s are put in devices where a hard drive would not fit for example a phone, IPad, Mac Book air. The size of the SSD though means that they are more complicated to build so they cost more than a conventional hard drive.

Optical Drives

Optical drives are fitted in most computers and use lasers to read and write information onto a disk. Take for instance a DVD, when you put it into the side of the computer your are putting it into an optical drive. A laser then reads the disk using electromagnetic waves in the visible light specturam to play the film. The laser can also write information onto a disk, say you want to burn some music onto a CD the laser will burm into onto the disk. Types of disk used in optical disk drives are DVDs, CDs and Blu-Ray disks. Optical drives are also used in DVD players and CD players.

Monitors

The monitor is the place on a computor where images and text are dislplayed. All the parts in the computor work so that the monitor can display the right text, images and files. The screen is actually made of thounsand os tiny LED lights which, when put together, create huge intractable images (kind of like the lights in London Olympic Stadium).

CPU

The CPU is the Central Processing Unit. This is brain of the computor where it reads the code from the hard drive and then turns it into letters, numbers and pictures to display on the monitors. The bsic CPU was created by Alan Turing, he created a machine that could read and then adapt it into something else. That basic methd is still used in most CPUs.

RAM

RAM is the Random Acess Memory. This is where all the data used to run basic and essential operations is stored. It is different to a hard drive or SSD because it does not run in any particular order, a hard drive for instance can only read and write data in a predetermined order because of mechanical constraints, a RAM uses intergrated circuits to access any data any time as long as it is stored in a devive that can read it.