Dataset lost all data?

[dgarner]

I have a TrueNAS installation running Cobia v23.10.0.1 with multiple datasets, one in particular `/z10/devops` that became unmounted from SMB/NFS shares .. So I went to remount it and it was empty, I thought it was due to permission errors so I went in and re-applied permissions recursively and finally noticed after a day or so that the used/aval. size was 116kb ..

I did not have snapshots set up, genius move. Is there any way to at least search the logs and see when data from this dataset was changed and get an idea of what the hell happened...?

 

[sfatula]

You can try a zpool history poolname (not datasetname) but doubtful that's going to show anything that may have removed data without deleting the pool. Maybe a changed mountpoint or something like that. Never heard of zfs removing data like that so not sure what to think off hand.

 

[winnielinnie]

one in particular `/z10/devops` that became unmounted from SMB/NFS shares .. So I went to remount it and it was empty

What do you mean by this?