Applies to NetApp E-Series SANtricity OS Answer The impending drive failure is not a critical alert. When the drive fails, it will trigger a critical alert. All Critical events are considered "alertab...Applies to NetApp E-Series SANtricity OS Answer The impending drive failure is not a critical alert. When the drive fails, it will trigger a critical alert. All Critical events are considered "alertable," along with some Warning and Informational events.