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Backup philosophy

Mindset

  • 3-2-1 Backup strategy
  • Restore strategy is more important than backup strategy
  • Testing backup plans would not be a bad idea. If we don't test backups, we don't have them. We must recheck backup/restore plans monthly, quarterly or yearly

The 3-2-1 Rule

  • 3 means: having at least 3 total copies of data
    1
    - local machine
    2
    - external hard drive/removeable disk device
    3
    - cloud storage
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  • 2 means: keep the backed-up data on 2 different storage types
    1
    - local machine
    2
    - cloud
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  • 1 means: having at least 1 copy offsite
    1
    Even if you have two copies on two separate storage types but both are stored onsite,
    2
    a local disaster could wipe out both of them.
    3
    Keep a third copy in an offsite location, like the cloud.
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