Add a new metric smartctl_device_state for the device state from ATA SCT.

metrics.go

@@ -151,6 +151,17 @@ var (
 		},
 		nil,
 	)
+	metricDeviceState = prometheus.NewDesc(
+		"smartctl_device_state",
+		"Device state (0=active, 1=standby, 2=sleep, 3=dst, 4=offline, 5=sct)",
+		[]string{
+			"device",
+			"model_family",
+			"model_name",
+			"serial_number",
+		},
+		nil,
+	)
 	metricDeviceStatistics = prometheus.NewDesc(
 		"smartctl_device_statistics",
 		"Device statistics",

smartctl.go

@@ -49,6 +49,7 @@ func (smart *SMARTctl) Collect() {
 	smart.mineRotationRate()
 	smart.mineTemperatures()
 	smart.minePowerCycleCount()
+	smart.mineDeviceSCTStatus()
 	smart.mineDeviceStatistics()
 	smart.mineDeviceStatus()
 }
@@ -231,6 +232,21 @@ func (smart *SMARTctl) minePowerCycleCount() {
 	)
 }
 
+func (smart *SMARTctl) mineDeviceSCTStatus() {
+	status := smart.json.Get("ata_sct_status")
+	if status.Exists() {
+		smart.ch <- prometheus.MustNewConstMetric(
+			metricDeviceState,
+			prometheus.GaugeValue,
+			status.Get("device_state").Float(),
+			smart.device.device,
+			smart.device.family,
+			smart.device.model,
+			smart.device.serial,
+		)
+	}
+}
+
 func (smart *SMARTctl) mineDeviceStatistics() {
 	for _, page := range smart.json.Get("ata_device_statistics.pages").Array() {
 		table := strings.TrimSpace(page.Get("name").String())