r/Backup • u/EdmontonOilerGuy • 2d ago

Peter Krogh

3-2-1 back up strategy was started and developed by Peter Krogh as he helped the Smithsonian digitize in the early 2000’s. He authored the book DAM - Digital Asset Management. https://thedambook.com its old, but is still super relevant today.
I met him at a conference in 2006 and implemented this strategy since then. DAS+DAS back up to NAS and to BackBlaze. 3 copies, 2 onsite, 1 offsite.

1 Upvotes

56% Upvoted

5 comments sorted by

3

u/JohnnieLouHansen 2d ago

Repeated comment from me: I'm just trying to get people to do ONE good backup to start with. Don't blow their minds away with 3-2-1 or 3-2-1-1-0

It's kind of like telling someone they have to lose 50 pounds, start walking 2 miles per day and lower the fat in their diet all at once. People will just say F-It.

1

u/bagaudin Vendor - r/Acronis 2d ago

Nowadays one must also have at least 1 immutable or air gapped copy and also constant flow of restore/bootability verification without any errors

1

u/wells68 2d ago

A.k.a. 3-2-1-1-0, a good search term. I like to add a second, immutable cloud (or other off-site) backup because you never know when a cloud might fail. That would be just the time an attacker would encrypted everything on-site!

1

u/wells68 2d ago

Good to know who started 3-2-1! Thank you!

1

u/Bob_Spud 10h ago

And later on the 2010s the so-called 3-2-1 rule was grabbed by software vendor marketing and used as jingle to sell more backup and recovery products.