this post was submitted on 08 Aug 2023
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3-2-1
3 copies of data
2 different storage medium
1 set of data at an off-site location
Commonly refered by the sailors as "one spouse in each port"
Way to just stereotype my profession... Even though it's true with some guys! Hahaha
If you have an offsite copy of your files (and not in a sync service like Dropbox) you are already in a better position than most.
Restoring from offsite takes time, even with Backblaze’s option of shipping a hard disk. You may also have data corruption troubles, companies may close all of sudden. It’s just not as convenient as local copies.
A further copy that is locally available is simply a better strategy. Adding more copies after these two is not a bad idea but you start getting hit by the law of diminishing returns.
You can actually read more about the 3-2-1 rule in a Backblaze post: https://www.backblaze.com/blog/the-3-2-1-backup-strategy/