Hey there, a bit more than a year ago, a large folder was on our truenas was accidentally deleted. So i used the snapshot from the day before and created a dataset from the snapshot, and copied back the files I needed. it was a very large folder of about 15 tib. after one year all of the snapshots are automatically deleted. So now, I was waiting for the 15 tib to clear up, but it didn’t happen.
When I go to the snapshots, I can see a couple of oldones, some but under “used” non of them is even in the tib range. I double checked if I really deleted the dataset from the snapshot, but that is also gone.
So I’m not sure, what this space is now occupied with, and how I get it back?
Any help is greatly appreciated!
-Toby
Hi and welcome to the forums.
So it sounds like you perhaps cloned a snapshot which although it appears as a dataset it still has a relationship with that snapshot. If you then promote the clone you effectively cut the relationship between the snapshot and the dataset. The main difference between these two is how much space is taken by the dataset. In a cloned environment the dataset essentially consumes no space to begin with as it references the snapshot however when you promote the clone it now consumes all the space the snapshot did.
Might not answer your question just yet but gives you an idea perhaps about what happened.
Thanks for the reply. I understand, that the new dataset only references to the data form the snapshot. But as I didn’t role back the entire snapshot, but copied the data back to the live system, it had the data then twice on the system. Once still in the snapshot, once as the current data. And somehow the data from the old snapshot still consumes space, that I can’t clear up.
So after you cloned the dataset you copied the data out of the clone over to your live dataset. Correct?
Did you then delete the clone or is that still present?
:-)))) never mind… the folder wasn’t deleted back than, I found it, someone accidentally moved it…
