diff --git a/www/NavigationTree.js b/www/NavigationTree.js
index 04de8dae..5f44aace 100644
--- a/www/NavigationTree.js
+++ b/www/NavigationTree.js
@@ -155,7 +155,7 @@ Ext.define('PBS.view.main.NavigationTree', {
 	init: function(view) {
 	    view.rstore = Ext.create('Proxmox.data.UpdateStore', {
 		autoStart: true,
-		interval: 5 * 1000,
+		interval: 15 * 1000,
 		storeId: 'pbs-datastore-list', // NOTE: this is queried by selectors, avoid change!
 		model: 'pbs-datastore-list',
 	    });
diff --git a/www/window/MaintenanceOptions.js b/www/window/MaintenanceOptions.js
index 713da569..757c9fcf 100644
--- a/www/window/MaintenanceOptions.js
+++ b/www/window/MaintenanceOptions.js
@@ -21,6 +21,16 @@ Ext.define('PBS.window.MaintenanceOptions', {
 	labelWidth: 120,
     },
 
+    apiCallDone: function(success, response, options) {
+	if (success) {
+	    let datastoreStore = Ext.data.StoreManager.lookup('pbs-datastore-list');
+	    if (datastoreStore) {
+		// delay a bit to allow the window to close and maintenance mode to take effect
+		setTimeout(() => datastoreStore.load(), 10);
+	    }
+	}
+    },
+
     items: {
 	xtype: 'inputpanel',
 	onGetValues: function(values) {