Suppression routines are described for implementation by a monitoring service. The monitoring service uses collected data to identify faulty storage volumes. Advantageously, in some cases, the monitoring service can notify an operator of the storage system that certain storage volumes are faulty. In some embodiments, these notifications are to be suppressed because not all notifications of faulty volumes are necessary. Suppression rules can indicate that a faulty storage volume is at fault because it is a test volume, associated with a large power outage, or some other learned event from storage command metrics. The monitoring service can suppress notifications about these known system issues, among others.