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Use of Storage Requirements, media and devices

Use of Storage Requirements, media and devices. AQA INFO 1 Section 5. Why data is stored. Data is likely to be used again and re-entering is time consuming Storage media is transferable Data can be backed up Data can be archived. Hard Disk. Magnetic storage device Location: CPU

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Use of Storage Requirements, media and devices

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  1. Use of Storage Requirements, media and devices AQA INFO 1 Section 5 TC@TGSG based on material from Mott,Leeming,Williams

  2. Why data is stored • Data is likely to be used again and re-entering is time consuming • Storage media is transferable • Data can be backed up • Data can be archived TC@TGSG based on material from Mott,Leeming,Williams

  3. Hard Disk • Magnetic storage device • Location: CPU • Stores the operating system/software and other files • Can manage file structure; • Makes it easier to locate files TC@TGSG based on material from Mott,Leeming,Williams

  4. Floppy Disk • For many years was essential [A: drive] • Now it is becoming obsolete due to small storage size and data transfer is slow. TC@TGSG based on material from Mott,Leeming,Williams

  5. CD-ROMs [Compact Disk-Read Only Memory] • Portable • Store larger quantities of data [750mb] • Less prone to damage > laser not magnetic • Data can be read but not written to/edited or saved. TC@TGSG based on material from Mott,Leeming,Williams

  6. CD R [Compact disk – Recordable] • Writable compact disks • Data cannot be altered once recorded on • Suitable for archiving data • Suitable for multimedia TC@TGSG based on material from Mott,Leeming,Williams

  7. CD RW [Compact disk – Rewritable] • Rewriteable compact disks • Data can be recorded/deleted and edited • Suitable for multimedia TC@TGSG based on material from Mott,Leeming,Williams

  8. DVD [Digital Versatile Disk] • High capacity optical disk • Can store large amounts of data [up to 17GB] • Used for films and audios TC@TGSG based on material from Mott,Leeming,Williams

  9. Flash Memory [USB Memory Stick] • Removable backing storage • Uses flash memory i.e. User plugs it in and uses it • Is small and light • High capacities [up to 7 GB] • Often used for graphical images and musical files TC@TGSG based on material from Mott,Leeming,Williams

  10. Summary • Storage devices can be fixed/removable • Used for increasing capacity/backup/archiving • Hard disk = high capacity & permanent • Floppy Disk = low capacity & portable • Flash media = high capacity & portable • CD ROM = medium capacity & read only • CD R & CD RW = High capacity & rewritable • DVD = read only & Very high capacity TC@TGSG based on material from Mott,Leeming,Williams

  11. website • http://www.teach-ict.com/as_a2_ict_new/ocr/AS_G061/312_software_hardware/storage_devices/miniweb/index.htm TC@TGSG based on material from Mott,Leeming,Williams

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