3-2-1 Backup Rule: Does Your Data Exist in 3 Places?
Have you heard of the 3-2-1 backup rule? The idea is simple but powerful: if your data doesn't exist in at least 3 places, it doesn't really exist. More specifically, the rule says:
- 3 copies of your data
- 2 different storage media (e.g., local disk + cloud)
- 1 copy stored off-site
It's a well-established baseline in the industry, and some organizations even extend it to a 3-2-1-1-0 model — adding one immutable or air-gapped copy and zero unverified backups. Despite how long this rule has been around, a surprising number of people (and teams) still don't follow it.
This week's (2026-05-12) chat we want to talk about backup habits — at home, at work, for your personal projects, wherever. Some discussion starters:
- Do devs take better care of their data and have better backup habits than non-devs? Or does knowing how things work make us more complacent ("the cloud handles it")?
- Do you have your own system for protecting your data? What does it look like in practice?
- Any nightmares or lessons learned the hard way?
Everyone and anyone is welcome to join as long as you are kind, supportive, and respectful of others. Zoom link will be posted at 12pm MDT.


