diff --git a/controller/instance_manager_controller.go b/controller/instance_manager_controller.go
index 7ad59550cc..9237305308 100644
--- a/controller/instance_manager_controller.go
+++ b/controller/instance_manager_controller.go
@@ -521,10 +521,6 @@ func (imc *InstanceManagerController) isDateEngineCPUMaskApplied(im *longhorn.In
 }
 
 func (imc *InstanceManagerController) syncLogSettingsToInstanceManagerPod(im *longhorn.InstanceManager) error {
-	if types.IsDataEngineV1(im.Spec.DataEngine) {
-		return nil
-	}
-
 	if im.Status.CurrentState != longhorn.InstanceManagerStateRunning {
 		return nil
 	}
@@ -536,7 +532,7 @@ func (imc *InstanceManagerController) syncLogSettingsToInstanceManagerPod(im *lo
 	defer client.Close()
 
 	settingNames := []types.SettingName{
-		types.SettingNameV2DataEngineLogLevel,
+		types.SettingNameLogLevel,
 		types.SettingNameV2DataEngineLogFlags,
 	}
 
@@ -547,15 +543,21 @@ func (imc *InstanceManagerController) syncLogSettingsToInstanceManagerPod(im *lo
 		}
 
 		switch settingName {
-		case types.SettingNameV2DataEngineLogLevel:
-			err = client.LogSetLevel(longhorn.DataEngineTypeV2, "spdk_tgt", setting.Value)
+		case types.SettingNameLogLevel:
+			if types.IsDataEngineV1(im.Spec.DataEngine) {
+				err = client.LogSetLevel(longhorn.DataEngineTypeV1, "", setting.Value)
+			} else {
+				err = client.LogSetLevel(longhorn.DataEngineTypeV2, "", setting.Value)
+			}
 			if err != nil {
-				return errors.Wrapf(err, "failed to set log level for %v", settingName)
+				return errors.Wrapf(err, "failed to set instance-manager log level to %v, using setting %v", setting.Value, settingName)
 			}
 		case types.SettingNameV2DataEngineLogFlags:
-			err = client.LogSetFlags(longhorn.DataEngineTypeV2, "spdk_tgt", setting.Value)
-			if err != nil {
-				return errors.Wrapf(err, "failed to set log flags for %v", settingName)
+			if types.IsDataEngineV2(im.Spec.DataEngine) {
+				err = client.LogSetFlags(longhorn.DataEngineTypeV2, "spdk_tgt", setting.Value)
+				if err != nil {
+					return errors.Wrapf(err, "failed to set spdk_tgt log flags to %v, using setting %v", setting.Value, settingName)
+				}
 			}
 		}
 	}