Comment 4 for bug 1866262

One workaround is to manually change on the worker node the ownership and permissions of pvc-4cc7d51b-f1a2-4d2e-bcfb-791bb3b1622d/mount to "drwxrws---" and root:users

This allows the Kubeflow pod to write to the volume. Mounting this RWM volume in another Kubeflow pod also works, and I can see the files created from one notebook in the other notebook.