Nagios Support Forum

I've multiple service checks for tracking certain information from a preferred vendor's RAID subsystem.

One of these checks for a certain link failure, presented by the RAID's XML output as a count. If there's been zero failures since the last subsystem reboot, it's 0. If one, the count is 1. This count needs to be tracked, and notified, but after this has happened, the threshold needs to reset to the current value +1, as these systems are rebooted maybe once per year (therefore we're unable to reset the count on the RAID itself.)

So, can I script something somewhere to do this on XI?

Yes. You will need to create a custom plugin (perhaps wrapping the current plugin) to track that value. Plugin development guidelines are below:
https://nagios-plugins.org/doc/guidelines.html