diff --git a/charts/cozystack/templates/_helpers.tpl b/charts/cozystack/templates/_helpers.tpl
index d3843255..5d4daffe 100644
--- a/charts/cozystack/templates/_helpers.tpl
+++ b/charts/cozystack/templates/_helpers.tpl
@@ -34,7 +34,12 @@ machine:
     image: {{ . }}
     {{- end }}
     {{- (include "talm.discovered.disks_info" .) | nindent 4 }}
-    disk: {{ include "talm.discovered.system_disk_name" . | quote }}
+    {{- $disk := include "talm.discovered.system_disk_name" . }}
+    {{- if eq $disk "" }}
+    disk: /dev/sda
+    {{- else }}
+    disk: {{ $disk | quote }}
+    {{- end }}
   network:
     hostname: {{ include "talm.discovered.hostname" . | quote }}
     nameservers: {{ include "talm.discovered.default_resolvers" . }}
diff --git a/charts/generic/templates/_helpers.tpl b/charts/generic/templates/_helpers.tpl
index e55dab0c..86f25554 100644
--- a/charts/generic/templates/_helpers.tpl
+++ b/charts/generic/templates/_helpers.tpl
@@ -7,7 +7,12 @@ machine:
         {{- toYaml .Values.advertisedSubnets | nindent 8 }}
   install:
     {{- (include "talm.discovered.disks_info" .) | nindent 4 }}
-    disk: {{ include "talm.discovered.system_disk_name" . | quote }}
+    {{- $disk := include "talm.discovered.system_disk_name" . }}
+    {{- if eq $disk "" }}
+    disk: /dev/sda
+    {{- else }}
+    disk: {{ $disk | quote }}
+    {{- end }}
   network:
     hostname: {{ include "talm.discovered.hostname" . | quote }}
     nameservers: {{ include "talm.discovered.default_resolvers" . }}
diff --git a/pkg/generated/presets.go b/pkg/generated/presets.go
index e12cc0a1..855861ab 100644
--- a/pkg/generated/presets.go
+++ b/pkg/generated/presets.go
@@ -64,7 +64,12 @@ machine:
     image: {{ . }}
     {{- end }}
     {{- (include "talm.discovered.disks_info" .) | nindent 4 }}
-    disk: {{ include "talm.discovered.system_disk_name" . | quote }}
+    {{- $disk := include "talm.discovered.system_disk_name" . }}
+    {{- if eq $disk "" }}
+    disk: /dev/sda
+    {{- else }}
+    disk: {{ $disk | quote }}
+    {{- end }}
   network:
     hostname: {{ include "talm.discovered.hostname" . | quote }}
     nameservers: {{ include "talm.discovered.default_resolvers" . }}
@@ -175,7 +180,12 @@ machine:
         {{- toYaml .Values.advertisedSubnets | nindent 8 }}
   install:
     {{- (include "talm.discovered.disks_info" .) | nindent 4 }}
-    disk: {{ include "talm.discovered.system_disk_name" . | quote }}
+    {{- $disk := include "talm.discovered.system_disk_name" . }}
+    {{- if eq $disk "" }}
+    disk: /dev/sda
+    {{- else }}
+    disk: {{ $disk | quote }}
+    {{- end }}
   network:
     hostname: {{ include "talm.discovered.hostname" . | quote }}
     nameservers: {{ include "talm.discovered.default_resolvers" . }}