From 580b66711903619b3e47f8bef05b2e1ea2c6ba34 Mon Sep 17 00:00:00 2001
From: Lucas Serverhost <lucas-f@live.at>
Date: Wed, 14 Oct 2026 17:42:52 +0200
Subject: [PATCH] node exporter: counter corretion for samsung hdd

---
 network/node-exporter-smartmon.sh | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/network/node-exporter-smartmon.sh b/network/node-exporter-smartmon.sh
index 3baf5f5..1c8fbac 100755
--- a/network/node-exporter-smartmon.sh
+++ b/network/node-exporter-smartmon.sh
@@ -8,24 +8,32 @@ for dev in $(smartctl --scan-open | awk '{print $1}'); do
     name=$(basename "$dev")
     LAST=0
     if [[ "$dev" == *nvme* ]]; then
-#        POWER_ON=$(smartctl -a "$dev" | awk -F': *' '/Power On Hours:/ {print $2}')
+        POWER_ON=$(smartctl -a "$dev" | awk -F': *' '/Power On Hours:/ {print $2}')
         LAST=$(smartctl -l selftest "$dev" 2>/dev/null \
             | grep "Completed" \
             | head -1 \
             | awk '{print $(NF-5)}')
     elif [[ "$dev" == *sd* ]]; then
-#        POWER_ON=$(smartctl -a "$dev" | awk '/Power_On_Hours/ {print $10}')
+        POWER_ON=$(smartctl -a "$dev" | awk '/Power_On_Hours/ {print $10}')
         LAST=$(smartctl -l selftest "$dev" 2>/dev/null \
             | grep "Completed" \
             | head -1 \
             | awk '{print $(NF-1)}')
+        MODEL=$(smartctl -i "$dev" | awk -F': *' '/Device Model/ {print $2}')
+        # ST2000LM003 self-test hour counter rolls over at 65536
+        if [[ "$MODEL" == "ST2000LM003 HN-M201RAD" ]] && \
+           [[ "$LAST" =~ ^[0-9]+$ ]] && \
+           [[ "$POWER_ON" =~ ^[0-9]+$ ]] && \
+           (( POWER_ON > 65535 && LAST < 65536 )); then
+            LAST=$((LAST + 65536))
+        fi
     else
         POWER_ON=99999999999
         echo $dev
     fi 
     
     # Skip devices without self-test history
-    echo $name: ${LAST}
+    echo $name: Last: ${LAST}, PowerOn: ${POWER_ON}
     echo "smart_last_selftest_poweron_hours{device=\"$name\"} $LAST" >> "$OUT"
 
 done