Optical Backing Storage( Information Slides)(1)


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Optical Backing Storage( Information Slides)(1)

  1. 2. <ul><li>Uses </li></ul><ul><li>To hold large files such as films that has a size of a couple of GB. </li></ul><ul><li>Advantages </li></ul><ul><li>CDs tend to be used for large files (but smaller than 1Gb) </li></ul><ul><li>DVDs are used to hold very large files </li></ul><ul><li>(several G b’s ) such as movie films. </li></ul><ul><li>Both CDs and DVDs are Portable. </li></ul><ul><li>Disadvantages </li></ul><ul><li>Files could be broken. </li></ul><ul><li>it is a Single ‘burning data’ </li></ul>
  2. 3. <ul><li>Uses </li></ul><ul><li>CDs used by software companies for giving out software programs and data; by Music companies </li></ul><ul><li>Advantages </li></ul><ul><li>CD ROM and DVD ROM are Applications which require the prevention of deletion of data . </li></ul><ul><li>DVDs used by film distributors to give out films. </li></ul><ul><li>Disadvantages </li></ul><ul><li>It can be written only once. </li></ul><ul><li>It can be only read. </li></ul><ul><li>The file could break. </li></ul>CD ROM DVD ROM
  3. 4. <ul><li>Uses </li></ul><ul><li>Applications which require a single ‘burning’ of data, e.g. CDs </li></ul><ul><li>DVDs can record film movies and television programs. </li></ul><ul><li>Advantages </li></ul><ul><li>Can record music downloads from the Internet, Music from MP3 format and it records data for archiving or backup purposes. </li></ul><ul><li>Cost of buying both devices are cheap </li></ul><ul><li>Access to files are fast. </li></ul><ul><li>Disadvantages </li></ul><ul><li>Can be written only once (in other words, it is a single burning data) </li></ul><ul><li>Has a short lifespan (usually less than 10years) </li></ul>DVD-R CD-R
  4. 5. <ul><li>Uses </li></ul><ul><li>It is an application which requires the updating of information and has an ability to record over old data. </li></ul><ul><li>Advantages </li></ul><ul><li>It is very useful for keeping generations of files. </li></ul><ul><li>It is pretty much like a 700MB floppy disk </li></ul><ul><li>Can be written and read more than once. </li></ul><ul><li>Disadvantages </li></ul><ul><li>Not suitable for music recording. </li></ul><ul><li>It has a low rate of writing files </li></ul><ul><li>Cost of both devices are basically expensive </li></ul><ul><li>Cannot be read over by older optical drives. </li></ul>DVD-RW CD-RW
  5. 6. <ul><li>Uses </li></ul><ul><li>DVD RAM is used in video recorders, camcorders and computer memory. </li></ul><ul><li>Advantages </li></ul><ul><li>Very fast access of small files on the disc. </li></ul><ul><li>Disc defect management designed to safeguard data. </li></ul><ul><li>Can be rewritten over 100,000 times </li></ul><ul><li>Disadvantages </li></ul><ul><li>Lower quality than DVD+RW and DVD-RW, despite predating both formats. </li></ul>DVD-RAM
  6. 7. <ul><li>Uses </li></ul><ul><li>HD DVD is used in video recorders and computer memory as well as games </li></ul><ul><li>main rival is blu-ray. </li></ul><ul><li>Advantages </li></ul><ul><li>Can store high definition videos and files. </li></ul><ul><li>Audio quality is high. </li></ul><ul><li>The cost of buying the HD DVD format is cheap. </li></ul><ul><li>Disadvantages </li></ul><ul><li>Region coding is vague. </li></ul><ul><li>The majority of companies have dismissed developing the HD DVD technology. </li></ul>HD-DVD
  7. 8. <ul><li>Uses </li></ul><ul><li>Used in video recorders and computer memory as well as games consoles. It has the largest storage capacity amongst all other optical devices. </li></ul><ul><li>Advantages </li></ul><ul><li>It can hold 4.5 hours of HD (high definition) videos </li></ul><ul><li>It has a large capacity of storing devices </li></ul><ul><li>Disadvantages </li></ul><ul><li>The cost of buying this format is much more expensive when compared to the cost of HD DVD format. </li></ul><ul><li>It has a lower audio quality when compared to HD DVD. </li></ul>Blu-ray disc
  8. 9. <ul><li>Pen Drives and memory cards are classified as NAND style data storage devices . </li></ul><ul><li>Both storage devices are considered to be an improvement on both the older floppy drive disks and the more modern compact disks . </li></ul><ul><li>Advantages </li></ul><ul><li>They are resistant in scratches and dust. </li></ul><ul><li>Files can be transferred quite easily </li></ul><ul><li>Large capacity </li></ul><ul><li>Portable </li></ul><ul><li>Disadvantages </li></ul><ul><li>Has a limited number of write and erase cycles before failure </li></ul><ul><li>Can be infected by viruses quite easily. </li></ul><ul><li>Files can be damaged by physical impacts (E.g. Dropping) </li></ul><ul><li>It has great speed </li></ul>Pen drive Memory cards
  9. 10. <ul><li>It is the smallest form, used as a removable storage </li></ul><ul><li>More robust than other forms of storage </li></ul><ul><li>Can be easily written and updated. </li></ul><ul><li>Contains no mechanic parts. </li></ul><ul><li>Everything is done electronically. </li></ul><ul><li>Solid state backing storages has a much higher speed than is possible with electromechanical disk drives. </li></ul><ul><li>Solid state backing storages lags in terms of storage capacity. </li></ul><ul><li>The cost is basically expensive when compared to electromechanical drives. </li></ul>