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Showing posts from November, 2020

3-2-1-1-0 Rule for Backups - The New Gold Standard

  Revisiting An Old Friend The 3-2-1 rule for backups has been around for decades. It's a rather simple principle you can find documentation on almost anywhere backups are discussed. The rules are as follows: 3 copies of your data 2 media types 1 copy is off-site 3 Copies of Your Data The principal is simple, you have 3 copies of your data (at a minimum) consisting of the following: 1 working copy (your production data) 1 local backup copy for fast backup & restoration tasks 1 off-site copy for disaster recovery 2 Media Types This one is hotly debated to mean many things depending on who you talk to. On the extreme end, some will say that it means having something vastly different in storage like Hard Disk Drives (HDD) as one media type and Linear Tape-Open (LTO) as another. The thought being that if you have different "media types" that you would avoid a common mode of failure. Concerns of a bug or virus being able to exploit a weakness in a common operating system,