• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

An Introduction To Modern Storage Devices

Extracts from this document...


An Introduction To Modern Storage Devices There are many ways of storing information and data for use with modern computer systems and new developments are constantly being made. Many changes have occurred since the first personal computers were developed, allowing a lot more information to be stored, and on storage devices which are generally a lot smaller and easier to handle than methods of storage previously used. In the past two or three years, there has been a massive change in the emphasis that has been placed on certain storage devices. Whereas 3.5" floppy discs were practically the only commercially available storage medium available to the public there are now many more on offer. The biggest change has perhaps been that writeable and rewriteable CD's are now widely available to the public. For many people, CD-R's have now replaced the use of floppy discs, as they offer an inexpensive way of storing large amounts of data. A typical floppy disc stores 1.44 Mb's of data, whereas a CD-R stores 650 Mb and both offer a similarly priced product. Some examples of modern storage mediums are: * Mini Disc * Tape Drive * MP3 Card * Hard Disk Drives * CD ROM * Zip Disk * DVD The major advances in the ability to store larger amounts of data is not only desireable, but essential as computers become more complex each day. As computing technology develops, much more complex information can be stored requiring much more storage space. ...read more.


The first hard disk drive designed in the 5.25" form factor used in the first PCs was the Seagate ST-506. It featured four heads and a 5 MB capacity. Below is a diagram which illustrates the evolution of the IBM harddisk from 1984 to date. Modern Hard Disk Drives Since we started using hard disk drives, there have been many advances in the technology within the computing and manufacturing industry. This has led to major improvements within the manufacture of hard disk drives although the basic principles and operating procedures of hard disks have remained unchanged since the early 80's. Most PC's now come with a minimum of 10GB of hard disk drive storage space, and it can be as much as around 73 GB. An image of a modern hard disk can be clearly seen below, including labelling illustrating the most important features. How Do Hard Disks Work? A hard disk uses round, flat disks called platters, coated on both sides with a special material designed to store information as magnetic patterns. The platters are mounted on a spindle. The platters rotate on the spindle at high speed, powered by a special spindle motor. Special heads are mounted onto sliders and used to either record information onto the disk or read from it. The sliders are mounted onto actuator arms, which are positioned over the surface of the disk and controlled by a device called an actuator. The surface of each platter on the disk can hold tens of billions of individual bits of data. ...read more.


The following table summarises the most common platter sizes used in PC's Platter Diameter Typical Form Factor Application 5.12 5.25" Oldest PCs, used in servers through the mid-1990s and some retail drives in the mid-to-late 1990s; now obsolete 3.74 3.5" Standard platter size for the most common hard disk drives used in PCs 3.0 3.5" High-end 10,000 RPM drives 2.5 2.5", 3.5" Laptop drives (2.5" form factor); 15,000 RPM drives (3.5" form factor) 1.8 PC Card (PCMCIA) PC Card (PCMCIA) drives for laptops 1.3 PC Card (PCMCIA) Originally used on hand-held PCs (no longer made) 1.0 CompactFlash Digital cameras, hand-held PCs and other consumer electronic devices Researchers at IBM are currently developing a new substance that could be used in the manufacture of hard disk drive platters in the future. Instead of using metallic film on the surface, a solution containing organic molecules and iron and platinum particles if used on the platters. This solution is spread out and heated. This causes the iron and platinum particles to arrange themselves into a natural grid of crystals, with each crystal able to hold a magnetic charge. This has the potential to increase the areal density capability of the recording media of hard disks by as much as 100 times. It is still in the development stages, and advances still need to be made in the read/write head capabilities of a hard disk before it can be put into commercial use. BSc Business Information Systems - I.T Assignment - David Davies Page 1 of 6 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Hardware section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Hardware essays

  1. Computer Hardware, uses, advantages and disadvantages.

    changes decimals into fractions If you are used to automatic word completion and correction then you can type a lot faster. It will take a lot of practice to get used to some of the main functions. There is not much difference.

  2. Ict - Unit 2B

    This helps the company to easily communicate with their suppliers and customers. They can also access their e-mail accounts electronically using the internet connection. The internet connection allows the e-mails to be sent to the servers such as hotmail or yahoo depending on the server they use.

  1. Memory and Storage

    * Takes a very long-time to backup data. Back-Up Copies Just in case something goes wrong and data is deleted or spoiled in some way, it is necessary and useful to have back-up copies the data. Most copies are done on floppy disks, but this is not a good choice because they do not store large amounts of data.

  2. Hardware Choices and Operating System.

    This can save you some space in front of your computer. It is more expensive than a wired keyboard. Software Software is written programs or rules that refer to the operation of a computer system that are stored in read or write memory.

  1. Choosing hardware and input devices.

    main function is to allow a user to communicate with a computer by clicking icons with a mouse.

  2. GCSE ICT - Imput devices.

    Key benefits to using external disk drives are adding additional storage space or adding an easily removable backup source. It could also be useful for preventing the heat from the drive increasing the heat inside a computer case. The internal hard disk gives computers the ability to remember things when the power goes out.

  1. Choosing the best harware for my system.

    spelling mistake then you have to type the whole thing again therefore more time wasting. Application Software 1. List all the applications that you used Microsoft Word Microsoft Access Internet explorer Paint This table shows the application that I am going to use the main function and their advantage and disadvantage.

  2. Unit 14 Mobile communication technology

    all sometimes the maps can think you are in a different location then what you?re actually in confusing you and making you think twice whether to follow the map or not. Web browser Phones have their own web browsers which use touch screens to make it easier to use and

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work