Cambridge Nationals R001 - Data storage

Cambridge Nationals R001 - Data storage

1. Data Usage

   • Priority Users
   • Link feedback to users
     • Primary key/unique id
   • Storage on portable devices
   • Data Protection
     • Password to open
     • Password to modify
     • Encryption
       • Data is changed, on sender and receive have key to place it back to original
   • Backing up and archiving data
     • Back up
       • Placing data onto another area in case the original is lost
     • Archive
       • Moving or backing up data not regular use but may be useful
     • Methods
       • Cloud
       • Tape
         • Son-Father-Grandfather
           • Grandfather-father-son[edit] Grandfather-father-son backup refers to a common rotation scheme for backup media. In this scheme there are three or more backup cycles, such as daily, weekly and monthly. The daily backups are rotated on a daily basis using a FIFO system as above. The weekly backups are similarly rotated on a weekly basis, and the monthly backup on a monthly basis. In addition, quarterly, half-yearly, and/or annual backups could also be separately retained. Often some of these backups are removed from the site for safekeeping and disaster recovery purposes.
       • Hard Disk
         • Internal
         • External
       • Solid State Disk
         • Costs more
         • No moving parts
       • Memory Stick
       • Optical Disc
         • DVD
         • CD
         • Blu-Ray
   • Data Storage (mobile device)
     • Cloud
       • Internet storage
       • Store large amounts
       • Need Internet connection
       • Relatively cheap
       • Can share
       • Automatically backed up
       • Examples
         • AppleID
         • Dropbox
         • Sky Drive
         • Google Docs
       • Can Synchronise
     • Internal memory
       • Save data on the phone
       • Limited space
       • Access offline
       • How do you back up?
       • Limited sharing
       • Quick to access
     • Card (SIM, SD)
       • Move between devices
       • Limited space
       • Quick to acces