Permission denied on container disk

[claude]

I have an Ubuntu installation in an Incus container that I use to update my IP address with my ISP, IONOS (DynDNS).

It works fine.

I would like to back up data from this Ubuntu installation to a dataset.

I mapped a dataset “/mnt/DisqueB/ubuntu” to a directory “/mnt/ubuntu” by creating a disk using the graphical interface:

When I try to access “/mnt/ubuntu”, I get a “Permission denied” message.

The dataset permissions are listed below:

Thank you in advance for your help.

[awalkerix]

You need to grant access to the truenas unprivileged container root user. There is documentation for this. You also will need to grant access to potentially other users / groups in the container. There is documentation for this as well.

[claude]

@awalkerix

You need to grant access to the truenas unprivileged container root user.

Done. It works. Very simple once you know how.
Merci.