Just to give a little background on my setup, I have an external work drive that backs up nightly to an internal drive in my 2010 Mac Pro running OS X Mavericks. The master drive and the backup drive are straight clones of each other, so all the paths are the same.
So this is a bit of a bizarre and paranoia-inducing problem I encountered recently:
I was working on a project that I wanted easy access to, so I dragged the folder over to the sidebar as I usually do. I do my work. I shut down my computer at night. The next day I turn it on and continue working. No problem. One day I turn on my computer, click on the folder in the sidebar, and all my work from the previous day was gone. All of it. How could this be? I check the file path. It should say it's on my master drive, "Leonardo," but instead it says "Leonardo BACKUP." Turns out I had been working off the backup drive the previous day without my knowledge, so when the main drive went to clone itself that night, it just wiped out everything I'd done the previous day.
I've set up precautions now so that if this sort of thing happens again, there's an archive that exists on the backup drive so things aren't just deleted forever if they don't match the main drive. BUT I shouldn't have to worry about checking the drive path of my sidebar folders every time I go to work on a project. I can absolutely guarantee that I dragged the correct folder to the sidebar initially. It just decided on its own to switch over to the backup drive, possibly because the main drive got randomly ejected and the cloned backup drive was just sitting there in my Mac. But that's just a theory.
So my question is: has anyone ever heard of this sort of thing happening or know any way to prevent it?
Also, this wasn't just a one time thing. Since the initial incident, I've been checking the folder path religiously every time I open a sidebar folder. Most of the time it's been fine, but there was one other occasion where the file path had switched over to the backup drive without warning.