Failed to umount dataset: Dataset Pool/ix-apps not found

TrueNAS General
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I reinstalled TrueNAS SCALE and restored my dataset from my remote backup, and now I get this error… What do I do?

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I assume most of your data is in host path volumes???

If those are OK… I’d suggest installing Apps from scratch.

If that is not acceptable. you would need to provide a thorough history of your systems, software, and dataset. Perhaps someone might see where things went wrong.

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How do you install apps from scratch?

Most of my data is in a remote backup anyway, so I don’t mind reinstalling

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What do you mean by “now I get this error” exactly? What are you attempting to do when the error appears?

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Nothing, just entered the apps page and it shows. I can’t use anything app-related.

Note: I think this can be replicated if you simply export your pool.

  1. Export pool (without deleting related tasks)
  2. Go to apps, and you’ll see that error.
  3. Create a new pool with the same name - the error persists.
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Creating a new pool with the same name will probably confuse the system… it has data about the old pool.

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So that’s a bug… How do I fix it? I can’t use my server because of that…
Edit: I renamed my Pool from “Pool” to “Main” and I still can’t unset or select a different pool for apps:

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This is making me reconsider whether I should use TrueNAS, I just migrated from plain Ubuntu, hoping this would make life easier - but as of now, it doesn’t.

Linked issue: Corrupted disk, ix-apps dataset lost, how to reset Apps? - #7 by neofusion

When would this become available? Should I try v25 beta…?

Wait no… I am on ElectricEel-24.10.0.2, where this PR should exist. So it wasn’t fixed.

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For anyone reading this: as a temporary fix:

  1. I created the ix-apps dataset using the CLI (zfs create Pool/ix-apps)
  2. Disabled apps using the GUI (Apps → Configuration → Unset Pool)
  3. Reselected my Pool as my Apps pool (Apps → Configuration → Select Pool)

This broke the apps (No such file or directory: '/mnt/.ix-apps/app_configs') but made docker available again.

So for now I am using Dockge to run my apps, but the apps GUI is completely not functional.

Edit:
4. Running sudo mkdir /mnt/.ix-apps/app_configs made the errors go away. I’m still sticking to Dockge for now.

1 Like
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Are you still talking about this bug report and related fix?
On the right hand side it states that the fix is scheduled in 24.10.1.

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Correct… and that version is out next week. Nightlies have those fixes now.