Buffalo LinkStation Pro Duo LS-WTGL/R1 User Manual page 56

Advanced Settings
Maintenance (Alert Settings)
Alerts can be configured on the
LinkStation to make audible noises
when a problem is detected. Along with
the audible noise, alert emails will be
sent out if Mail Notification was properly
configured. Please select the features
you would like to receive an audible
sound alert from and then press the
Apply button.