diff --git a/agent-config.yaml b/agent-config.yaml
index 71a9780..02cc50c 100644
--- a/agent-config.yaml
+++ b/agent-config.yaml
@@ -45,7 +45,7 @@ hosts:
     wwn: "{{ host['wwn'] }}"
 {% else %}
   rootDeviceHints:
-    deviceName: "/dev/sda"
+    deviceName: "/dev/{{ default_disk|basename }}"
 {% endif %}
   interfaces:
   - macAddress: {{ baremetal_macs[loop.index0] }}
diff --git a/plans/kcli_plan_infra_default.yml b/plans/kcli_plan_infra_default.yml
index d7287ca..3498be1 100644
--- a/plans/kcli_plan_infra_default.yml
+++ b/plans/kcli_plan_infra_default.yml
@@ -30,6 +30,7 @@ memory: 32768
 ctlplanes: 3
 ctlplane_numcpus:
 ctlplane_memory:
+default_disk: sda
 workers: 0
 worker_numcpus:
 worker_memory:
diff --git a/ztp/scripts/siteconfig.sample.yml b/ztp/scripts/siteconfig.sample.yml
index acacf8f..6391661 100644
--- a/ztp/scripts/siteconfig.sample.yml
+++ b/ztp/scripts/siteconfig.sample.yml
@@ -122,7 +122,7 @@ spec:
       bootMACAddress: {{ mac }}
       bootMode: {{ 'UEFI' if spoke_uefi else 'legacy' }}
       rootDeviceHints:
-       deviceName: /dev/{{ node.disk|default('sda')|string|basename }}
+       deviceName: /dev/{{ node.disk|default(default_disk)|string|basename }}
 {% if 'ip' in node %}
       nodeNetwork:
         interfaces: