A: You did hear correct, and I'm woefully behind on the paper that lays it all out, but let me give you the top line points.

3DR is a way of thinking about data recovery - at multiple levels, from local through true disaster. It is a construct for putting your brain to work around what data should have what protection levels and for how long.

3DR stands for Data Recovery, Disaster Recovery, and Doomsday Recovery. The first two imply that recoveries, for any reason, occur from disk. The last one from tape. We want you to never have to use the last level.

In order to grasp the concept you should first try to forget everything you know and assume about backup and recovery -- specifically, the way you do backup and recovery today.

Assumptions: