The datastore usage alarm will not re-trigger if it has already been triggered and manually reset to a green status

Products

• VMware vCenter Server

Environment

VMware vCenter Server 7.0.0
VMware vCenter Server 6.0.x
VMware vCenter Server 8.0
VMware vCenter Server 6.5.x
VMware vCenter Server 6.7.x

Resolution

The datastore usage alarm will not re-trigger if it has already been triggered and manually reset to a green status when the datastore usage does not subsequently drop below the warning threshold percentage defined on the alarm.

For example, if the warning threshold is set to 80% and the critical is 90%, the alarm will first trigger when the datastore reaches 80% capacity. If a user resets the alarm to green at this point, it will NOT trigger again, even at the 90% threshold, until the actual datastore usage drops below 80%.

This is currently working as designed outlined by VMware engineering.