I used that Dataset as storage for several Apps. One of them wrote data to “VM” till it was 100% filled. Basically my fault, wrong configuration.
I stopped all running Apps, deleted some Data. But had still 100% filled.
Question 1: How could I have deleted data the App (UrBackup) worte to “VM”?
I decided (probably wrong) to use snapshot from before “VM” got filled. After restoring to the snapshot “VM” is now filled to 85% (which is not how it was before) and all installed apps are gone.
1 UrBackup App still works fine, webpage is reachable and it would do it’s job. But the App section in Truenas is completely empty. So I can not edit any settings or do updates or whatsoever.
The directories of all prior installed apps are still here, as far as I can see. I’m not so deep into Linux….
What would be preferred way to have an unfiltered look on the datasets? Something like a “file explorer”? or just by “ls” from command line
2 would still be interesting….
3 Where would I see “pool checkpoints”? I’m only aware of the snapshots
4 currently I hear heavily disk activity. What would be a counterpart to Windows “Task Manager” where I can see all running processes and disk activity?
tried to delete some snapshots. since disk usage is still 85% (was < 20% before) I thought that the snapshots still have the “change from 20% to 100%” stored. So i deleted all snapshots created after the one I rolled back to.
no change
the I tried to delete the snapshot I rolled back to. Here I get error “** [EFAULT] cannot destroy ‘VM@auto-2025-12-11_06-00’: dataset is busy”
Does this mean, that roll back to this snapshot is still ongoing?
Boot environment is the system, nothing else.
Could it be that you have mounted the snapshot read-only instead of reverting?
For the record, the solution to your “app pool full” issue would have been to stripe it with a further drive to give more space, and then to delete files to make space and remove the extra drive.
maybe you need just to set again the app pool? Configuration → Choose pool
Side note: i’m an urbackup user too, relying on incrementals, and if i may suggest: i have excluded urbackup output dataset at all from snapshot task. Simply reason, they grow really too much for what they offer, and the risk that both those backups get corrupted, and source machine became unvailable (i only take backup of one atm) is for me really far from happen. But is just my personal tradeoff.
I opted for the automatic way via cronjob, discarding the old one and creating a fresh one, i just set the hour differently from what was suggested: i set a time where usually i’m awake, but the nas is not used by anyone… so if something strange occur i have the possibility to keep the old one stopping on the fly the job ok maybe an overthinking but i like to have more choice in case of need.
)
