diff --git a/roles/host_maintenance/README.md b/roles/host_maintenance/README.md
new file mode 100644
index 0000000..9bcc649
--- /dev/null
+++ b/roles/host_maintenance/README.md
@@ -0,0 +1,21 @@
+
+systemd_mount vars task example:
+
+``` yaml
+host_maintenance_disk_mounts:
+    - source: /dev/disk/by-uuid/xxxxxxx
+        target: /var/lib/rancher
+        mount_type: ext4
+        unit_before: k3s.service
+        unit_conflicts: umount.target
+        mount_options:
+        - defaults
+    - source: /dev/disk/by-uuid/xxxxx
+        target: /var/lib/rancher/k3s/storage 
+        unit_before: k3s.service
+        unit_conflicts: umount.target
+        mount_type: ext4
+        mount_options:
+        - defaults
+
+```
\ No newline at end of file
diff --git a/roles/host_maintenance/tasks/systemd_mount.yaml b/roles/host_maintenance/tasks/systemd_mount.yaml
index 7a2987a..c3eed8c 100644
--- a/roles/host_maintenance/tasks/systemd_mount.yaml
+++ b/roles/host_maintenance/tasks/systemd_mount.yaml
@@ -1,7 +1,11 @@
-#vars:
-#  host_maintenance_systemd_mount_target: ""
-#  host_maintenance_systemd_mount_source: ""
+- ansible.builtin.assert:
+    that:
+      - item.source is defined
+      - item.target is defined
+      - item.mount_type is defined
+    fail_msg: "All of source, target, and mount_type must be defined for each disk entry."
 
+  loop: "{{ host_maintenance_disk_mounts }}"
 - name: check target folders
   ansible.builtin.file:
     path: "{{ item.target }}"
diff --git a/roles/host_maintenance/templates/systemd_mount.j2 b/roles/host_maintenance/templates/systemd_mount.j2
index d33e640..54987a8 100644
--- a/roles/host_maintenance/templates/systemd_mount.j2
+++ b/roles/host_maintenance/templates/systemd_mount.j2
@@ -1,14 +1,26 @@
+# set by ansible role mylimbo.globals.host_maintenance role, do not edit manually
 [Unit]
 Description=Mount {{ item.target }} managed by mylimbo.globals collections, host_maintenance role 
-#After=
-Conflicts={{ item.unit_conflicts }}
+
+{% if item.unit_after is defined %}
+# After dependencies
+After={{ item.unit_after }}
+{% endif %}
+
+{% if item.unit_before is defined %}
+# Before dependencies
 Before={{ item.unit_before }}
+{% endif %}
 
 [Mount]
 What={{ item.source }}
 Where={{ item.target }}
 Type={{ item.mount_type }}
+
+{% if item.mount_options is defined %}
+# Mount options, if specified
 Options={{ item.mount_options | join(',') }}
+{% endif %}
 
 [Install]
 WantedBy=multi-user.target
\ No newline at end of file