this post was submitted on 07 Mar 2026
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[–] OrteilGenou@lemmy.world 3 points 10 hours ago

I remember back when I first started seeing a DR plan with three tiers of restore, 1 hour, 12 hours or 72 hours. I knew that to 1 hour meant a simple redirect to a DB partition that was a real time copy of the active DB, and twelve hours meant that failed, so the twelve hours was a restore point exercise that would mean some data loss, but less than one hour, or something like that.

I had never heard of 72 hours and so raised a question in the meeting. 72 hours meant having physical tapes shipped to the data center, and I believe meant up to 12 (though it could have been 24) hours of data lost. I was impressed by this, because the idea of having a job that ran either daily or twice daily that created tape backups was completely new to me.

This was in the early aughts. Not sure if tapes are still used...