Hi!
I’m trying to move my apps from my main pool to a new “apps” pool with SSDs.
I just can’t get the whole thing to run if I just do the steps above. I have all the app locations set manually like for nextcloud: "Pool/nextcloud/config or /app or so on…
How can I get this done?
Thank you so much for this “Howto”. 
Still works perfectly for the current TrueNAS Scale v. 25.04.2.1!
Literally saved me my bütt when (due to external circumstances) having to move my TrueNAS-Installation to a VM with the drives passed through to the VM. But when I set it all up and made all other backups, I had forgotten about moving the “ix-apps” directory, because I thought it wasn’t as relevant, since any persistent data from configured containers is stored in a different pool anyway. However, the TrueNAS-Configs to actually run these containers is still stored in the “ix-apps”.
In my case I had to set up the relevant pool completely new due to hardware limitations not allowing me to use the same zfs-pool configuration as in the original TrueNas baremetal installation. So I am thankful for this, really. Allowing me to move / migrate these apps step by step away from TrueNAS (since TrueNAS now is a VM) to my new main hypervisor’s level, but keep them running until I am ready to make the switch for each individually.
Also surely TrueNAS itself saved my bütt too, allowing to really smoothly reimporting the old configs. Even the affected pool it was mounting perfectly, even in a degraded state. It was enough to correct the stuff I forgot to fix before.
I wish however, this was made easier using the UI by TrueNAS itself. Reading older forum posts, there once had been a solution to migrate all settings to the pool I designate to be the “newpool” automatically.
After hours in despair, unable to figure out what to do, I stumbled on your post.
I take my hat off and bow!
Thanks,
Rudi
bloody brilliant! Thank you so much! This worked brilliantly.
Followed your suggestion and for some reason the Make Destination Dataset Read-only? option didn’t persist when I launched the task. Replication passed but using the pool failed because truenas_catalog was read-only. Restarted and edited the task to find that this option was not properly set. I had to make sure this was set to IGNORE and all is working:
Thx! Helped a lot! 
Thanks for the awesome guide. I needed to move my .ix-apps due to some very large docker images filling up the existing pool.
Something confuse me. Once replication is completed you have old dataset as well as new one mounted at the same point ./ix-app. I think this is dramatically wrong and dangerous.
Furthermore I was not able to delete original ix-app dateset, it reported as in use.
So this procedure duplicate the space on two dataset and is unknown were data came from/to as Mas both are mounted ad same folder.
Despite, I wonder why goldeye release indrotuced auto replication, that apart another replication bug that need to be fixed, reproduce your procedure and result : old dataset is neither deledable neither unmountable
When you unset the apps pool, TrueNAS unmounts the apps dataset.
When it activates an apps pool, it mounts it.
Mmm you are saying that if I set the new data pool, this will not unset automatically the old one? Quite strange as set commans visually acts as a mutual exclusion (drop down menu) no a multiple choice. And if I switch back and forward the pools, only a single set of apps is showed, not both. I mean, mounting both show just one. It seems a bug…. But I will give a try asap
Oook right suggestion.
Steps to disable the default mountpoint of the old ix-apps dataset follows
fordsin$(zfs list -H -o name olddataset/ix-apps);do zfs set mountpoint=none "$ds"doneHello everyone, I started something and ended up breaking everything. Nothing will start anymore, I really need help, I’m desperate.
From what I understand, it’s coming from the mounting points, but I can’t seem to fix the problem.
Can you help me?I have so much stuff in there :s
I have a useless mount point that reappears every time I start the engine
ix application and my old pool (and now mounted in /mnt/mnt… I can’t even go back)
root@truenas[/]# zfs list | grep ix-apps
Ix-appllication-ssd/ix-apps 57.6G 81.9G 292K /mnt/.ix-apps
Ix-appllication-ssd/ix-apps/app_configs 67.2M 81.9G 65.0M /mnt/.ix-apps/app_configs
Ix-appllication-ssd/ix-apps/app_mounts 36.4G 81.9G 128K /mnt/.ix-apps/app_mounts
Ix-appllication-ssd/ix-apps/app_mounts/code-server 760K 81.9G 112K /mnt/.ix-apps/app_mounts/code-server
Ix-appllication-ssd/ix-apps/app_mounts/code-server/config 104K 81.9G 104K /mnt/.ix-apps/app_mounts/code-server/config
Ix-appllication-ssd/ix-apps/app_mounts/code-server/local 448K 81.9G 116K /mnt/.ix-apps/app_mounts/code-server/local
Ix-appllication-ssd/ix-apps/app_mounts/code-server/project 96K 81.9G 96K /mnt/.ix-apps/app_mounts/code-server/project
Ix-appllication-ssd/ix-apps/app_mounts/deluge 80.5M 81.9G 96K /mnt/.ix-apps/app_mounts/deluge
Ix-appllication-ssd/ix-apps/app_mounts/deluge/config 80.4M 81.9G 31.7M /mnt/.ix-apps/app_mounts/deluge/config
Ix-appllication-ssd/ix-apps/app_mounts/frigate 9.48G 81.9G 104K /mnt/.ix-apps/app_mounts/frigate
Ix-appllication-ssd/ix-apps/app_mounts/frigate/cache 165M 81.9G 9.71M /mnt/.ix-apps/app_mounts/frigate/cache
Ix-appllication-ssd/ix-apps/app_mounts/frigate/media 9.32G 81.9G 6.23G /mnt/.ix-apps/app_mounts/frigate/media
Ix-appllication-ssd/ix-apps/app_mounts/nextcloud 889M 81.9G 128K /mnt/.ix-apps/app_mounts/nextcloud
Ix-appllication-ssd/ix-apps/app_mounts/nextcloud-1 387M 81.9G 104K /mnt/.ix-apps/app_mounts/nextcloud-1
Ix-appllication-ssd/ix-apps/app_mounts/nextcloud-1/html 374M 81.9G 374M /mnt/.ix-apps/app_mounts/nextcloud-1/html
Ix-appllication-ssd/ix-apps/app_mounts/nextcloud-1/postgres_data 13.5M 81.9G 13.5M /mnt/.ix-apps/app_mounts/nextcloud-1/postgres_data
Ix-appllication-ssd/ix-apps/app_mounts/nextcloud-test 11.7G 81.9G 96K /mnt/.ix-apps/app_mounts/nextcloud-test
Ix-appllication-ssd/ix-apps/app_mounts/nextcloud-test/html 7.40G 81.9G 548M /mnt/.ix-apps/app_mounts/nextcloud-test/html
Ix-appllication-ssd/ix-apps/app_mounts/nextcloud-test/postgres_data 4.35G 81.9G 248M /mnt/.ix-apps/app_mounts/nextcloud-test/postgres_data
Ix-appllication-ssd/ix-apps/app_mounts/nextcloud/data 96K 81.9G 96K /mnt/.ix-apps/app_mounts/nextcloud/data
Ix-appllication-ssd/ix-apps/app_mounts/nextcloud/html 96K 81.9G 96K /mnt/.ix-apps/app_mounts/nextcloud/html
Ix-appllication-ssd/ix-apps/app_mounts/nextcloud/ix-postgres_backups 889M 81.9G 889M /mnt/.ix-apps/app_mounts/nextcloud/ix-postgres_backups
Ix-appllication-ssd/ix-apps/app_mounts/nextcloud/pgData 96K 81.9G 96K /mnt/.ix-apps/app_mounts/nextcloud/pgData
Ix-appllication-ssd/ix-apps/app_mounts/nextcloud1 11.4M 81.9G 112K /mnt/.ix-apps/app_mounts/nextcloud1
Ix-appllication-ssd/ix-apps/app_mounts/nextcloud1/data 96K 81.9G 96K /mnt/.ix-apps/app_mounts/nextcloud1/data
Ix-appllication-ssd/ix-apps/app_mounts/nextcloud1/pgBackup 96K 81.9G 96K /mnt/.ix-apps/app_mounts/nextcloud1/pgBackup
Ix-appllication-ssd/ix-apps/app_mounts/nextcloud1/pgData 11.1M 81.9G 10.8M /mnt/.ix-apps/app_mounts/nextcloud1/pgData
Ix-appllication-ssd/ix-apps/app_mounts/ollama 3.10G 81.9G 96K /mnt/.ix-apps/app_mounts/ollama
Ix-appllication-ssd/ix-apps/app_mounts/ollama/data 3.10G 81.9G 3.10G /mnt/.ix-apps/app_mounts/ollama/data
Ix-appllication-ssd/ix-apps/app_mounts/open-webui 1.59G 81.9G 104K /mnt/.ix-apps/app_mounts/open-webui
Ix-appllication-ssd/ix-apps/app_mounts/open-webui/data 1.59G 81.9G 1.59G /mnt/.ix-apps/app_mounts/open-webui/data
Ix-appllication-ssd/ix-apps/app_mounts/open-webui/ollama 1.35M 81.9G 100K /mnt/.ix-apps/app_mounts/open-webui/ollama
Ix-appllication-ssd/ix-apps/app_mounts/plex 9.08G 81.9G 104K /mnt/.ix-apps/app_mounts/plex
Ix-appllication-ssd/ix-apps/app_mounts/plex/config 9.08G 81.9G 4.62G /mnt/.ix-apps/app_mounts/plex/config
Ix-appllication-ssd/ix-apps/app_mounts/plex/data 96K 81.9G 96K /mnt/.ix-apps/app_mounts/plex/data
Ix-appllication-ssd/ix-apps/app_mounts/portainer 4.95M 81.9G 96K /mnt/.ix-apps/app_mounts/portainer
Ix-appllication-ssd/ix-apps/app_mounts/portainer/data 4.86M 81.9G 764K /mnt/.ix-apps/app_mounts/portainer/data
Ix-appllication-ssd/ix-apps/app_mounts/speedtest-tracker 5.27M 81.9G 96K /mnt/.ix-apps/app_mounts/speedtest-tracker
Ix-appllication-ssd/ix-apps/app_mounts/speedtest-tracker/config 5.17M 81.9G 1.04M /mnt/.ix-apps/app_mounts/speedtest-tracker/config
Ix-appllication-ssd/ix-apps/docker 20.8G 81.9G 19.0G /mnt/.ix-apps/docker
Ix-appllication-ssd/ix-apps/truenas_catalog 393M 81.9G 286M /mnt/.ix-apps/truenas_catalog
Zpool-NVME/ix-apps 41.4G 187G 8.09M /mnt/.ix-apps
Zpool-NVME/ix-apps/app_configs 96K 187G 96K /mnt/.ix-apps/app_configs
Zpool-NVME/ix-apps/app_mounts 96K 187G 96K /mnt/.ix-apps/app_mounts
Zpool-NVME/ix-apps/catalogs 234M 187G 56.5M /mnt/.ix-apps/catalogs
Zpool-NVME/ix-apps/default_volumes 96K 187G 96K /mnt/.ix-apps/default_volumes
Zpool-NVME/ix-apps/default_volumes-ix-applications-backup-system-update--2024-09-23_05:42:18-clone 96K 187G 96K /mnt/.ix-apps/default_volumes-ix-applications-backup-system-update--2024-09-23_05:42:18-clone
Zpool-NVME/ix-apps/docker 164K 187G 164K /mnt/.ix-apps/docker
Zpool-NVME/ix-apps/k3s 38.0G 187G 18.1G /mnt/.ix-apps/k3s
Zpool-NVME/ix-apps/k3s/kubelet 1.45M 187G 608K /mnt/.ix-apps/k3s/kubelet
Zpool-NVME/ix-apps/releases 2.95G 187G 144K /mnt/.ix-apps/releases
Zpool-NVME/ix-apps/releases/deluge 14.9M 187G 112K /mnt/.ix-apps/releases/deluge
Zpool-NVME/ix-apps/releases/deluge/charts 1.44M 187G 1.44M /mnt/.ix-apps/releases/deluge/charts
Zpool-NVME/ix-apps/releases/deluge/volumes 13.3M 187G 104K /mnt/.ix-apps/releases/deluge/volumes
Zpool-NVME/ix-apps/releases/deluge/volumes/ix_volumes 13.1M 187G 112K /mnt/.ix-apps/releases/deluge/volumes/ix_volumes
Zpool-NVME/ix-apps/releases/deluge/volumes/ix_volumes/config 12.8M 187G 12.8M /mnt/.ix-apps/releases/deluge/volumes/ix_volumes/config
Zpool-NVME/ix-apps/releases/deluge/volumes/ix_volumes/downloads 96K 187G 96K /mnt/.ix-apps/releases/deluge/volumes/ix_volumes/downloads
Zpool-NVME/ix-apps/releases/frigate 856K 187G 112K /mnt/.ix-apps/releases/frigate
Zpool-NVME/ix-apps/releases/frigate/charts 400K 187G 400K /mnt/.ix-apps/releases/frigate/charts
Zpool-NVME/ix-apps/releases/frigate/volumes 272K 187G 104K /mnt/.ix-apps/releases/frigate/volumes
Zpool-NVME/ix-apps/releases/frigate/volumes/ix_volumes 104K 187G 104K /mnt/.ix-apps/releases/frigate/volumes/ix_volumes
Zpool-NVME/ix-apps/releases/nextcloud 1.00G 187G 112K /mnt/.ix-apps/releases/nextcloud
Zpool-NVME/ix-apps/releases/nextcloud/charts 4.98M 187G 4.90M /mnt/.ix-apps/releases/nextcloud/charts
Zpool-NVME/ix-apps/releases/nextcloud/volumes 1023M 187G 104K /mnt/.ix-apps/releases/nextcloud/volumes
Zpool-NVME/ix-apps/releases/nextcloud/volumes/ix_volumes 1023M 187G 136K /mnt/.ix-apps/releases/nextcloud/volumes/ix_volumes
Zpool-NVME/ix-apps/releases/nextcloud/volumes/ix_volumes/data 96K 187G 96K /mnt/.ix-apps/releases/nextcloud/volumes/ix_volumes/data
Zpool-NVME/ix-apps/releases/nextcloud/volumes/ix_volumes/html 96K 187G 96K /mnt/.ix-apps/releases/nextcloud/volumes/ix_volumes/html
Zpool-NVME/ix-apps/releases/nextcloud/volumes/ix_volumes/ix-postgres_backups 1022M 187G 1022M /mnt/.ix-apps/releases/nextcloud/volumes/ix_volumes/ix-postgres_backups
Zpool-NVME/ix-apps/releases/nextcloud/volumes/ix_volumes/pgData 96K 187G 96K /mnt/.ix-apps/releases/nextcloud/volumes/ix_volumes/pgData
Zpool-NVME/ix-apps/releases/nextcloud1 11.9M 187G 112K /mnt/.ix-apps/releases/nextcloud1
Zpool-NVME/ix-apps/releases/nextcloud1/charts 304K 187G 304K /mnt/.ix-apps/releases/nextcloud1/charts
Zpool-NVME/ix-apps/releases/nextcloud1/volumes 11.4M 187G 104K /mnt/.ix-apps/releases/nextcloud1/volumes
Zpool-NVME/ix-apps/releases/nextcloud1/volumes/ix_volumes 11.3M 187G 120K /mnt/.ix-apps/releases/nextcloud1/volumes/ix_volumes
Zpool-NVME/ix-apps/releases/nextcloud1/volumes/ix_volumes/data 96K 187G 96K /mnt/.ix-apps/releases/nextcloud1/volumes/ix_volumes/data
Zpool-NVME/ix-apps/releases/nextcloud1/volumes/ix_volumes/pgBackup 96K 187G 96K /mnt/.ix-apps/releases/nextcloud1/volumes/ix_volumes/pgBackup
Zpool-NVME/ix-apps/releases/nextcloud1/volumes/ix_volumes/pgData 10.9M 187G 10.9M /mnt/.ix-apps/releases/nextcloud1/volumes/ix_volumes/pgData
Zpool-NVME/ix-apps/releases/plex-utills 1.92G 187G 112K /mnt/.ix-apps/releases/plex-utills
Zpool-NVME/ix-apps/releases/plex-utills/charts 4.47M 187G 4.47M /mnt/.ix-apps/releases/plex-utills/charts
Zpool-NVME/ix-apps/releases/plex-utills/volumes 1.92G 187G 128K /mnt/.ix-apps/releases/plex-utills/volumes
Zpool-NVME/ix-apps/releases/plex-utills/volumes/ix_volumes 96K 187G 96K /mnt/.ix-apps/releases/plex-utills/volumes/ix_volumes
Zpool-NVME/ix-apps/releases/plex-utills/volumes/pvc-7bb48c6f-7fdb-428d-a7ac-b8d3efa20a56 96K 187G 96K /mnt/.ix-apps/releases/plex-utills/volumes/pvc-7bb48c6f-7fdb-428d-a7ac-b8d3efa20a56
Zpool-NVME/ix-apps/releases/plex-utills/volumes/pvc-82708e38-6262-480d-a24b-32e53294b479 324K 187G 248K /mnt/.ix-apps/releases/plex-utills/volumes/pvc-82708e38-6262-480d-a24b-32e53294b479
Zpool-NVME/ix-apps/releases/plex-utills/volumes/pvc-9625e3bc-1383-41aa-a418-78070578ca0b 1.92G 187G 1.92G /mnt/.ix-apps/releases/plex-utills/volumes/pvc-9625e3bc-1383-41aa-a418-78070578ca0b
Zpool-NVME/ix-apps/truenas_catalog 233M 187G 233M /mnt/.ix-apps/truenas_catalog
root@truenas[/]# cd /mnt/mnt/Ix-appllication-ssd
root@truenas[/mnt/mnt/Ix-appllication-ssd]# pwd
/mnt/mnt/Ix-appllication-ssd
root@truenas[/mnt/mnt/Ix-appllication-ssd]# cd /mnt
root@truenas[/mnt]# ls
Zpool-NVME Zpool-SAS-6TO mnt
root@truenas[/mnt]#
Okay, I managed to restore my apps, but I’m still on my old app pool. I’m so afraid of starting over and messing everything up again.
Are you on 25.04.X or 25.10.0? 25.10 introduced a gui buildin way to migrate your apps.
Unfortunately, I can’t upgrade to 25.10.0 because my graphics card is no longer compatible :s
Can we expect an official addition in TrueNAS 25.04? Or perhaps the development of a small script? Thank you.
Since the migration tool was introduced in 25.10 I doubt it will get backported to 25.04
Thanks a lot for the guide, made me through it.
However I would add one very important step. (As I learned the hard way)
After step 1, you should run a snapshoot task. As apperntly “Replication Task” uses snapshot to replicate.
I ended up losing 4 days worth of changes in immich due do this. ( 4 day old snapshot )