try to fix the detailed view

app/UI/Disk/Forms/UpdateForm.php

@@ -74,7 +74,7 @@ class UpdateForm extends BaseForm implements ClientArea
         {
             $field = new Switcher('backup');
             if ($this->diskID == 'scsi0') {
-                $field->addHtmlAttribute(':disabled', true);
+                $field->addClass('disabled');
             }
             $this->addField($field);
         }