I've had to do some data recovery during the course of my personal life. If the data is valuable, the #1 rule is "always run a dd backup to another device firs

I've had to do some data recovery during the course of my personal life. If the data is valuable, the #1 rule is "always run a dd backup to another device first" IMO. Then you can play around on a device that you know isn't on the brink of failing.