Storage Devices And Media
- 1. STORAGE DEVICES AND MEDIA
- 2. Optical backing storage media suchas CDs and DVDsCDs tend to be used for large files (but smaller than 1Gb)which are too big for a floppy disc to hold such as music and general animation.
- 3. DVDs are used to hold very large files(several Gb) such as movie films. Both CDs and DVDs are portable i.e. they can be transported from one computer to another.
- 4. Both can be used to store computer data.CD ROM/ DVD ROMApplications which require the prevention of deletion of data, accidental or otherwise.
- 5. CDs used by software companies fordistributing software programs and data; by Music companies for distributing music albums and by book publishers for distributing encyclopedias, reference books etc.DVDs usedby film distributors.
- 6. CD R / DVD RApplications which require a single ‘burning’ of data, e.g. CDs– recording of music downloads from the Internet, recording of music from MP3 format, recording of data for archiving or backup purposes.
- 7. DVDs- recording of film movies and television programs.CD RW/DVD RW AdvantageApplications which require the updating of information and ability to record over old data. DisadvantageNot suitable for music recording but is very useful for keeping generations of files.
- 8. DVD RAMHoused in a cartridge. Used in video recorders, camcorders and computer memory.HD DVD Used in video recorders and computer memory as well as games consoles – main rival to blu-ray.AdvantagesNecessary to support the way your computer works
- 10. Stores and retrieves data much faster than a floppy disk or CD/DVD
- 11. Stored items are not lost when you switch off the computer
- 12. Cheap on a cost per megabyte compared to other storage devices DisadvantagesFar slower to access data than ROM or RAM chips
- 13. Hard disks can crash which stop the computer from working
- 14. Regular crashes can damage the surface of the disk, leading to loss of data in that sector
- 15. The disk is fixed inside the computer and cannot easily be transferred to another computer. BLU-RAYUsed in video recorders and computer memory as well as games consoles. Largest storage capacity of optical media.Solid state backing storageAdvantage.Smallest form of memory, used as removable storage. More robust than other forms of storage.Disadvantage.More expensive than other forms but can be easily written to and updated.Memory sticks/Pen drivesCan store up to many Gb. Used to transport files and backup data from computer to computer.Flash Memory cardsAdvantagesUsed in digital cameras, palmtops, mobile phones, MP3 players
- 16. They are more compact and portable than floppy disks or CDs/DVDs.
- 17. They hold more data than a floppy disk and nowadays often more than a CD.
- 18. They are more reliable than a floppy disk because they have no moving parts
- 19. They are being developed with fashionable looking outer casings and are almost becoming a 'fashion accessory' much in the way of a mobile phone. DisadvantagesAt the moment, the cost per megabyte of storage is more expensive than floppy disks, CDs or DVDs.
- 20. They can be easily lost
- 21. The metal part which is inserted into the USB port can be snapped off if they are handled roughly.