| Parameter | Description |
| Active | If checked, the rule is enabled and will be processed |
| Usage | The type of usage of the disk |
| Host | Can be used to restrict the monitoring to a given host (multi instance case). A star (‘*’) will match any host |
| Service | Defines which service is monitored. A star (‘*’) will match any service, and therefore, it will calculate the combined usage of all services. Otherwise, it is the usage of the specified service that will be calculated |
| Max used space (MB or %) | The alarm threshold for the current disk usage. You can specify percentage or absolute value in Mega Bytes |
| Max used space delta (MB or %) | The alarm threshold on the delta disk usage increase over the period set in the “Delta time” field. Example: Send an alarm if the disk usage increases by 20% in the last 5 min |
| Delta time (min) | The period of time used to make a delta comparison of the disk usage |
| Severity | Defines the level of severity of the alarm that will be generated if one of the thresholds is reached |
| Alarm tag | You can define some text to use as a prefix of the alarm message generated by the current rule |
| Alarm | Defines if an alarm has to be generated for the given rule |
| Metric | Defines if a metric has to be generated for the given rule |