I tried upgrading my TrueNAS ElectricEel-24.10.2 to Fangtooth the other day. I ran into trouble with my VMs (I know, Instances is experimental, but I wanted to try it.).
My original VM zvol resides on volume2/VMs/docker-tanj8o.
I created an Instance for my Docker VM, choosing to copy the data over, instead of moving it. It didn´t work very well, and I decided to go back to ElectricEel.
Now I have a dataset called volume2/.ix-virt taking up some space, and I would like to delete it.
The VM is what is taking up space. It is stored here:
volume2/.ix-virt/custom/default_docker-tanj8o
Running into new issues, and hoping someone can guide me through it.
First I tried to delete it via the GUI, and got an error message about snapshots, clones, etc. So I moved to the shell.
When I run this: zfs destroy volume2/.ix-virt/custom/default_docker-tanj8o
I get this response:
cannot destroy 'volume2/.ix-virt/custom/default_docker-tanj8o': volume has children
use '-r' to destroy the following datasets:
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-10_23-00-2w
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-13_01-00-12hrs
volume2/.ix-virt/custom/default_docker-tanj8o@incus_1747125920
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-08_23-00-2w
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-07_23-00-2w
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-13_09-00-12hrs
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-13_06-00-12hrs
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-13_10-00-12hrs
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-13_00-00-12hrs
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-01_23-00-2w
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-11_23-00-2w
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-13_07-00-12hrs
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-13_08-00-12hrs
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-12_23-00-12hrs
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-06_23-00-2w
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-09_23-00-2w
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-05_23-00-2w
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-13_04-00-12hrs
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-02_23-00-2w
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-12_23-00-2w
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-04-29_23-00-2w
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-13_03-00-12hrs
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-04-30_23-00-2w
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-13_05-00-12hrs
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-04_23-00-2w
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-13_02-00-12hrs
volume2/.ix-virt/custom/default_docker-tanj8o@auto-2025-05-03_23-00-2w
So, working through that list, I only get three rows down, and then, running this:
zfs destroy volume2/.ix-virt/custom/default_docker-tanj8o@incus_1747125920
I get this response:
cannot destroy 'volume2/.ix-virt/custom/default_docker-tanj8o@incus_1747125920': snapshot has dependent clones
use '-R' to destroy the following datasets:
volume2/VMs/docker-tanj8o@auto-2025-05-20_08-00-12hrs
volume2/VMs/docker-tanj8o@auto-2025-05-20_07-00-12hrs
volume2/VMs/docker-tanj8o@auto-2025-05-17_23-00-2w
volume2/VMs/docker-tanj8o@auto-2025-05-18_23-00-2w
volume2/VMs/docker-tanj8o@auto-2025-05-20_10-00-12hrs
volume2/VMs/docker-tanj8o@auto-2025-05-20_00-00-12hrs
volume2/VMs/docker-tanj8o@auto-2025-05-19_23-00-2w
volume2/VMs/docker-tanj8o@auto-2025-05-16_23-00-2w
volume2/VMs/docker-tanj8o@auto-2025-05-20_06-00-12hrs
volume2/VMs/docker-tanj8o@auto-2025-05-20_09-00-12hrs
volume2/VMs/docker-tanj8o@auto-2025-05-20_01-00-12hrs
volume2/VMs/docker-tanj8o@auto-2025-05-20_02-00-12hrs
volume2/VMs/docker-tanj8o@auto-2025-05-20_05-00-12hrs
volume2/VMs/docker-tanj8o@auto-2025-05-19_23-00-12hrs
volume2/VMs/docker-tanj8o@auto-2025-05-15_23-00-2w
volume2/VMs/docker-tanj8o@auto-2025-05-13_23-00-2w
volume2/VMs/docker-tanj8o@auto-2025-05-20_03-00-12hrs
volume2/VMs/docker-tanj8o@auto-2025-05-14_23-00-2w
volume2/VMs/docker-tanj8o@auto-2025-05-20_04-00-12hrs
volume2/VMs/docker-tanj8o
Now, at the end of this list, it is demanding that I delete the original VM dataset.
I would like to delete the volume2/.ix-virt dataset, without losing my docker VM. I feel a little stuck, and hope someone knows a solution to this.