![]() Acknowledging the alarm won’t make it disappear, but it will become greyed out. For example, the default datastore usage alarm will trigger again if the thresholds are still exceeded after 5 minutes. If it is cleared then the alert will disappear, but will alert again depending on what its set in the alarm settings. When you right click on a triggered alarm you get the option to clear the alarm or acknowledge it. Selecting the datastore and then the alarms tab will give detail about which alarm has triggered the alert or warning: The other is in the Datastores and Datastore Clusters view. We should see a red exclaimation mark over any datastore that has triggered an alert. The first is the vCenter Events screen, access from the Home screen: Within the vSphere client you can see the alerts in a couple of places. On the datastore where I configured the alarm these thresholds were enough to generate a notification. To test this you can create a custom datastore usage alarm and set the thresholds to be along the lines of Warning when Datastore Disk Usage exceeds 10% and an Alert at 15%. The datastore usage alarm will send notifications when a datastore has exceeded it’s configured thresholds. Working with and Analysing Datastore Alarms Once configuration is complete, click ok to save the custom alarm.
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