truenas.generic.pool.summary-disk.status.template

{
    "prtg": {
        "description" : {
            "device": "TrueNAS Appliance",
            "query": "/api/v2.0/pool",
            "comment": "Pool disk health reported as percentage. Anything other than ONLINE reported as 0% health"
        },
        "result": [
			{           
				"channel": "Disk Health",
				"value": mean($[*].topology.data[*].children[?(@.type == "DISK")](@.status != "ONLINE" ? 0 : 100)),				
				"Unit": "Percent",
				"LimitMode": 1,
				"LimitMinError": 100,
				"Float": 1
            }		
        ]
    }
}