diff --git a/inventory/group_vars/asgard/vars.yml b/inventory/group_vars/asgard/vars.yml
index a7f5074..e30fb3a 100644
--- a/inventory/group_vars/asgard/vars.yml
+++ b/inventory/group_vars/asgard/vars.yml
@@ -4,7 +4,7 @@
 # --------------------------------------------------------------------------------------------------
 system_base_additional_tcp_ports: "{{
   services_host_services | dict2items | map(attribute='value.tcp', default=[]) | flatten |
-  union(system_base_tcp_ports) }}"
+  union(system_base_tcp_ports | default([])) }}"
 
 # --------------------------------------------------------------------------------------------------
 # system:var
diff --git a/playbooks/roles/backups/restic/user/tasks/main.yml b/playbooks/roles/backups/restic/user/tasks/main.yml
index ce793b5..18af5c4 100644
--- a/playbooks/roles/backups/restic/user/tasks/main.yml
+++ b/playbooks/roles/backups/restic/user/tasks/main.yml
@@ -1,17 +1,17 @@
 ---
-- name: "create restic password file"
+- name: "{{ backups_restic_user_name }} : create restic password file"
   ansible.builtin.template:
     src: "./restic.password.j2"
     dest: "{{ backups_restic_user_restic_password_file }}"
     mode: 0600
 
-- name: "create aws key file"
+- name: "{{ backups_restic_user_name }} : create aws key file"
   ansible.builtin.template:
     src: "./restic-aws-keys.yml.j2"
     dest: "{{ backups_restic_user_aws_keys_file }}"
     mode: 0600
 
-- name: "configure service restic backups"
+- name: "{{ backups_restic_user_name }} : configure service restic backups"
   ansible.builtin.template:
     src: "./volumes.yml.j2"
     dest: "/etc/restic-batch.d/{{ backups_restic_user_name }}.yml"
diff --git a/playbooks/roles/backups/snapshots/user/tasks/main.yml b/playbooks/roles/backups/snapshots/user/tasks/main.yml
index c34b603..64eacc0 100644
--- a/playbooks/roles/backups/snapshots/user/tasks/main.yml
+++ b/playbooks/roles/backups/snapshots/user/tasks/main.yml
@@ -1,5 +1,5 @@
 ---
-- name: "configure service sanoid snapshots"
+- name: "{{ backups_snapshots_user_name }} : configure service sanoid snapshots"
   ansible.builtin.blockinfile:
     path: "/etc/sanoid/sanoid.conf"
     insertbefore: "# BEGIN ANSIBLE MANAGED BLOCK TEMPLATES #"
@@ -15,7 +15,7 @@
               recursive = yes
               process_children_only = yes
 
-- name: "configure service syncoid snapshots"
+- name: "{{ backups_snapshots_user_name }} : configure service syncoid snapshots"
   ansible.builtin.template:
     src: "./volumes.yml.j2"
     dest: "/etc/syncoid-batch.d/{{ backups_snapshots_user_name }}.yml"
diff --git a/playbooks/roles/music/datasets/tasks/main.yml b/playbooks/roles/music/datasets/tasks/main.yml
index 9426ce8..699affc 100644
--- a/playbooks/roles/music/datasets/tasks/main.yml
+++ b/playbooks/roles/music/datasets/tasks/main.yml
@@ -25,3 +25,10 @@
   community.general.zfs:
     name: "{{ music_user_data_dataset }}/flac"
     state: "present"
+
+- name: "create backup data dataset"
+  community.general.zfs:
+    name: "{{ system_backups_snapshots_data_dataset }}/{{ music_user_name }}"
+    state: "present"
+    extra_zfs_properties:
+      canmount: "off"