diff --git a/chart/questions.yaml b/chart/questions.yaml
index e803438..28cd548 100644
--- a/chart/questions.yaml
+++ b/chart/questions.yaml
@@ -327,6 +327,14 @@ The available volume spec options are:
     min: 0
     max: 100
     default: 25
+  - variable: defaultSettings.storageReservedPercentageForDefaultDisk
+    label: Storage Reserved Percentage For Default Disk
+    description: "The reserved percentage specifies the percentage of disk space that will not be allocated to the default disk on each new Longhorn node."
+    group: "Longhorn Default Settings"
+    type: int
+    min: 0
+    max: 100
+    default: 30
   - variable: defaultSettings.upgradeChecker
     label: Enable Upgrade Checker
     description: 'Upgrade Checker will check for new Longhorn version periodically. When there is a new version available, a notification will appear in the UI. By default true.'
diff --git a/chart/templates/default-setting.yaml b/chart/templates/default-setting.yaml
index f6adb0f..a00a809 100644
--- a/chart/templates/default-setting.yaml
+++ b/chart/templates/default-setting.yaml
@@ -15,6 +15,7 @@ data:
     {{ if not (kindIs "invalid" .Values.defaultSettings.replicaAutoBalance) }}replica-auto-balance: {{ .Values.defaultSettings.replicaAutoBalance }}{{ end }}
     {{ if not (kindIs "invalid" .Values.defaultSettings.storageOverProvisioningPercentage) }}storage-over-provisioning-percentage: {{ .Values.defaultSettings.storageOverProvisioningPercentage }}{{ end }}
     {{ if not (kindIs "invalid" .Values.defaultSettings.storageMinimalAvailablePercentage) }}storage-minimal-available-percentage: {{ .Values.defaultSettings.storageMinimalAvailablePercentage }}{{ end }}
+    {{ if not (kindIs "invalid" .Values.defaultSettings.storageReservedPercentageForDefaultDisk) }}storage-reserved-percentage-for-default-disk: {{ .Values.defaultSettings.storageReservedPercentageForDefaultDisk }}{{ end }}
     {{ if not (kindIs "invalid" .Values.defaultSettings.upgradeChecker) }}upgrade-checker: {{ .Values.defaultSettings.upgradeChecker }}{{ end }}
     {{ if not (kindIs "invalid" .Values.defaultSettings.defaultReplicaCount) }}default-replica-count: {{ .Values.defaultSettings.defaultReplicaCount }}{{ end }}
     {{ if not (kindIs "invalid" .Values.defaultSettings.defaultDataLocality) }}default-data-locality: {{ .Values.defaultSettings.defaultDataLocality }}{{ end }}
diff --git a/chart/values.yaml b/chart/values.yaml
index 60af9f1..3734d61 100644
--- a/chart/values.yaml
+++ b/chart/values.yaml
@@ -120,6 +120,7 @@ defaultSettings:
   replicaAutoBalance: ~
   storageOverProvisioningPercentage: ~
   storageMinimalAvailablePercentage: ~
+  storageReservedPercentageForDefaultDisk: ~
   upgradeChecker: ~
   defaultReplicaCount: ~
   defaultLonghornStaticStorageClass: ~