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Backup Strategies

Mike Jeays March 2012 mike.jeays@rogers.com. Backup Strategies. Potential losses. Your laptop gets stolen. Your disk fails catastrophically Your house gets burgled Your house burns down Your off-line storage company goes out of business

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Backup Strategies

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  1. Mike Jeays March 2012 mike.jeays@rogers.com Backup Strategies

  2. Potential losses • Your laptop gets stolen. • Your disk fails catastrophically • Your house gets burgled • Your house burns down • Your off-line storage company goes out of business • The police search your house and take all your computer equipment and storage devices/media • HOW MUCH DATA DO YOU LOSE?

  3. Backup hard disk Lots of options available USB and SATA connections Safer if mounted when needed (reduce risk of corruption in power failures)

  4. Older IDE caddy – USB 2.0

  5. On-line storage • Many companies offer on-line storage • Amazon S3 service – pay by usage each month • Dropbox – first 2 GB are free, then • Carbonite - $59 per year, “unlimited” • Gmail attachments

  6. CDs and DVDs • Excellent for storage of up to a few gigabytes – 4.7 GB per DVD. • Making a monthly copy and keeping most or all or the old ones gives you a great deal of protection. • Guards against files becoming corrupted, and only backing up the corrupt copy. • Can be kept in a bank safe-deposit box • CD-R, DVD+/-R cannot be modified; an advantage in this case

  7. USB Memory sticks and camera cards • More storage than a DVD, but easily overwritten • An even better fit for a safe-deposit box

  8. Redundancy is everything • If you don't have 3 copies, it isn't backed up • Check periodically that you can restore from backup successfully. An emergency recovery is TOO LATE • Keep data in different places; in your house, at the bank, on-line. They are very unlikely to all disappear at once – and if they do, you probably have much worse problems to worry about

  9. Encryption • Consider encrypting data before it goes “to the cloud” • Lots of tools available, both proprietary and open-source • Examples: • Truecrypt • OpenSSL • GPG • Use GOOD passwords

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