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

Memory and Storage

Extracts from this document...

Introduction

Types of Storage Uses Advantages Disadvantages Floppy Disk Used for private data. Also used for keeping extra copies of data or for transporting data. * Private data can be stored. * They are small and therefore data can be taken away and easily used on another PC. * Can be used to make extra back-up copies. * Not very strong and can get easily damaged or lost. * Not all machines are able to read from the same disk. * The amount of storage space is often too small for some data files. CD-ROM Used for data and program that does not need to change. Data cannot be written onto these types of disk. They have data stored digitally, instead of magnetically. Used for encyclopaedias, games, other software. * Data cannot be erased from CD-ROMS. * CD-ROMs are small and portable. * CD-ROMs have a much larger storage capacity than floppy disks. * They can get easily lost. * You cannot save to a CD-ROM. * A CD-ROM has a small storage capacity than a hard disk. * It is faster to access items from a hard disk than a CD-ROM. DVD Used to store films which are a lot better in picture and sound quality. Can be used on DVD players to connect to TVs or available as a computer package. * They have a very large storage capacity. ...read more.

Middle

5. Human error may lead to data being changed or deleted. Difference between Main/Internal Memory & Backing Storage Internal memory is the memory that is occupied by data and instruction being dealt with by the computer at the time. The data or instructions are lost if the PC is switched off. Backing storage is the additional memory which is used to store data and instructions that we may need to use again and again. The data or instructions are NOT lost if the PC is switched off. Health & Safety To minimise health risks and to increase safety there are many regulations and laws that need to be followed. By law, employers in offices need to provide tilt-able screens, adjustable chairs, snit-glare screen filters, foot supports, good lighting uncramped workstations, frequent breaks and eye tests. This has to be done by law in offices but not in schools. However, there are general guidelines to follow. There should be no trailing wires, food and drink should not be placed near a machine, electrical sockets must not be overloaded, there must be adequate space around the machine, heating and ventilation must be suitable, lighting must be suitable with no glare or reflections, benches must be strong enough to support the computers. Many computer users have back problems, but to overcome this, a fully-adjustable chair should be used to avoid poor posture, footrests and tilting screens. ...read more.

Conclusion

* Support the way you computer works. * Large storage capacity. * Stored items are not lost when the computer is switched off. * Come as a fixed unit inside the PC - cannot get lost easily. * It is not very fast to access the files because the read-write heads have to move to the correct parts of the disk and then read the data. * If the hard disk crashes the computer will not work. * If the hard disk is fixed inside the computer then it cannot be removable. Magnetic Tape Data and programs can be transferred onto the tape. * In large-scale mainframe computers, tapes come in large spools. * 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. Today we may use jaz drives or zip drives, but these do not store as much as magnetic tape. Making back-ups are very important. Backing storage is non-volatile and is always available when we require data and software. Backing storage is normally a hard disk. However, it is very important not to rely on just one type of backing storage, additional copies are useful to be kept elsewhere. There are many reasons why original copies may be deleted or spoilt: 6. ?? ?? ?? ?? Storage Devices & Media ...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. Peer reviewed

    "VHS is dead, long live DVD".

    3 star(s)

    If you were to hook your TV up to a stereo system you would be able to hear that it's not true stereo. Cassettes are bulky, take up more space and brake. The VHS player/recorder is also unreliable with the main part being the clutch-cam the main failure and the reasons for chewed tapes.

  2. Computer Hardware, uses, advantages and disadvantages.

    Though they function differently. Thus, CPU Phenom || X6 increases frequency to 400 GHz on condition that three or less cores are loaded. To guarantee function stability voltage being raised automatically. This kind of realization does not seem to be complicated, however, result - that is the main thing for user.

  1. Choosing hardware and input devices.

    Because TFT Monitors are small it takes up less space than CRT Monitors. Because TFT Monitors are small it is easier to damage than CRT Monitors The best place to use them are offices because they take up less space and like this more monitors would be able to be

  2. Free essay

    Unit 3 Course Work

    Photoshop is the flagship product of Adobe Systems. Photoshop CS4 is the current version it was officially announced on 23 September 2008. Photoshop revolves around editing pixels, unlike Adobe Illustrator which uses vectors. When an image is rendered into Photoshop, it is compiled by millions of single-coloured pixels.

  1. ICT & Special Needs This essay focuses on the way that Mr Glassey uses ...

    This PDA offers most features found on standard PDAs these features include, Bluetooth allows the device to connect to other wireless Bluetooth devices for example, cells phones, wireless keyboard and perform ActiveSync with a Personal Computer.

  2. An Introduction To Modern Storage Devices

    Hard Disk Drives What Is A Hard Disk Drive? A hard disk drive is generally the main storage device used in a PC system and is a fairly essential part. It is generally contained inside the computer, although can be contained in a "box" which can be inserted and removed from the PC tower.

  1. Ict - Unit 2B

    SPSS: SPSS is used to sort out customer feedback. SPSS is a software that analyses the customer's data about a questionnaire quickly and it also cross tabulates responses such as the total of male's and female's response to a particular question.

  2. How compact disc read only memory works.

    These all are available on CD-ROM. The CD-ROM The underside of the plastic CD-ROM disk is coated with a very thin layer of aluminum that reflects light. Data is written to the CD-ROM by burning microscopic pits into the reflective surface of the disk with a powerful laser.

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