From f27f5c1ddb80ada4e23752cc719477b8e93ab7f1 Mon Sep 17 00:00:00 2001
From: "manuel.maier" <manuel.maier@maieredv.de>
Date: Wed, 20 May 2026 09:21:01 +0200
Subject: [PATCH] =?UTF-8?q?zfs-spindown.sh=20hinzugef=C3=BCgt?=
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---
 zfs-spindown.sh | 53 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 zfs-spindown.sh

diff --git a/zfs-spindown.sh b/zfs-spindown.sh
new file mode 100644
index 0000000..e3f233f
--- /dev/null
+++ b/zfs-spindown.sh
@@ -0,0 +1,53 @@
+#!/bin/bash
+
+# KONFIGURATION
+DRIVES=("sda" "sdb" "sdc" "sdd" "sde")
+IDLE_TIME=600 # 10 Minuten (in Sekunden)
+CHECK_INTERVAL=60 # Prüf-Intervall (1 Minute)
+
+declare -A last_sector_count
+declare -A last_activity
+
+echo "ZFS-Spindown-Watchdog gestartet. Monitoring für: ${DRIVES[*]}"
+
+# Initialisierung der Start-Werte
+for drive in "${DRIVES[@]}"; do
+    last_sector_count[$drive]=0
+    last_activity[$drive]=$(date +%s)
+done
+
+while true; do
+    current_time=$(date +%s)
+    
+    for drive in "${DRIVES[@]}"; do
+        if [ -f "/sys/block/$drive/stat" ]; then
+            # Sektoren auslesen (Spalte 3 = Read, Spalte 7 = Write)
+            stats=$(cat "/sys/block/$drive/stat")
+            read_sectors=$(echo $stats | awk '{print $3}')
+            write_sectors=$(echo $stats | awk '{print $7}')
+            current_sectors=$((read_sectors + write_sectors))
+            
+            # Prüfen, ob sich die Sektoren-Anzahl seit dem letzten Check geändert hat
+            if [ "$current_sectors" -ne "${last_sector_count[$drive]}" ]; then
+                diff=$((current_sectors - last_sector_count[$drive]))
+                echo "[$(date '+%H:%M:%S')] Aktivität auf $drive: $diff Sektoren. Timer resettet."
+                last_sector_count[$drive]=$current_sectors
+                last_activity[$drive]=$current_time
+            else
+                # Wenn keine Aktivität, berechne die verstrichene Zeit
+                elapsed=$((current_time - last_activity[$drive]))
+                
+                if [ "$elapsed" -ge "$IDLE_TIME" ]; then
+                    # Nur Befehl senden, wenn Platte nicht schon im Standby ist
+                    status=$(/sbin/hdparm -C "/dev/$drive" 2>/dev/null)
+                    if [[ "$status" == *"active/idle"* ]]; then
+                        echo "[$(date '+%H:%M:%S')] $drive ist seit $((elapsed/60)) Min idle. Schicke sie in den Standby..."
+                        /sbin/hdparm -y "/dev/$drive" > /dev/null 2>&1
+                    fi
+                fi
+            fi
+        fi
+    done
+    
+    sleep $CHECK_INTERVAL
+done
\ No newline at end of file