That is the one I am using; however, I have it set to only display the data for my aggregates. I haven't attempted to write alerts for the data though.
I have been using a Health Stats poller with an alert to go with it for alerts on NetApp health issues for Disks, Fans, Power Supplies, and Global Health. You can find that poller NetApp Health Statsalong with the link to the alert for it. Just last night it alerted me to one of our disk shelves hitting 98% full.
Okay, I suppose I can make an alert that will exclude the wacky values that the OID is giving me back.
I have the Health Stats pollers already in there (thanks). I'll see what I can arrange maybe get what I need from them....