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

    - local machine
    - external hard drive/removeable disk device
    - cloud storage
  • 2 means: keep the backed-up data on 2 different storage types

    - local machine
    - cloud
  • 1 means: having at least 1 copy offsite

    Even if you have two copies on two separate storage types but both are stored onsite,
    a local disaster could wipe out both of them.
    Keep a third copy in an offsite location, like the cloud.