I have confirmed the incident for Host disk unhealthy, after that we are not receiving any incident for that measure.
can someone help me do I need to make any changes.
Another thing that you can check is whether you have a suppression time frame in the incident definition. There is an option to set an amount of time for the incident to be suppressed after the incident has ended, this could be affecting your alerting as well.
Are you sure that after confirmed the incident there was another violation to trigger the incident?
Are you not receiving the incident in the incident dashboard or you are talking about email?
If you are talking about email then check whether 'Smart Alerting' is enabled and if it is enabled then disable it to receive the alerts on every violation of the configured threshold .