Add a new metric smartctl_device_erc_seconds for reporting the device Error Recovery Control (TLER) setting.

metrics.go

@@ -224,4 +224,16 @@ var (
 		},
 		nil,
 	)
+	metricDeviceERCSeconds = prometheus.NewDesc(
+		"smartctl_device_erc_seconds",
+		"Device SMART Error Recovery Control Seconds",
+		[]string{
+			"device",
+			"model_family",
+			"model_name",
+			"serial_number",
+			"op_type",
+		},
+		nil,
+	)
 )

smartctl.go

@@ -54,6 +54,7 @@ func (smart *SMARTctl) Collect() {
 	smart.mineDeviceStatus()
 	smart.mineDeviceErrorLog()
 	smart.mineDeviceSelfTestLog()
+	smart.mineDeviceERC()
 }
 
 func (smart *SMARTctl) mineExitStatus() {
@@ -354,3 +355,18 @@ func (smart *SMARTctl) mineDeviceSelfTestLog() {
 		)
 	}
 }
+
+func (smart *SMARTctl) mineDeviceERC() {
+	for ercType, status := range smart.json.Get("ata_sct_erc").Map() {
+		smart.ch <- prometheus.MustNewConstMetric(
+			metricDeviceERCSeconds,
+			prometheus.GaugeValue,
+			status.Get("deciseconds").Float()/10.0,
+			smart.device.device,
+			smart.device.family,
+			smart.device.model,
+			smart.device.serial,
+			ercType,
+		)
+	}
+}