diff --git a/miyagi-backup.sh b/miyagi-backup.sh
index 5343741..2f62ec9 100644
--- a/miyagi-backup.sh
+++ b/miyagi-backup.sh
@@ -18,7 +18,6 @@ usage() {
     exit 1
 }
 
-# Konfigurationsdatei initialisieren (nur wenn -c übergeben)
 CONFIG_FILE=""
 while getopts "c:" opt; do
     case "$opt" in
@@ -35,7 +34,52 @@ if [[ -n "${CONFIG_FILE:-}" ]]; then
         log "ERROR: Configuration file not found: $CONFIG_FILE"
         exit 1
     fi
+
     source "$CONFIG_FILE"
+
+    # ==========================
+    # Konfigurationsprüfung
+    # ==========================
+    REQUIRED_VARS=(
+        SSHPORT
+        BACKUPSERVER
+        ZSYNC
+        MAINTDAY
+        SHUTDOWN
+        UPDATES
+        SOURCEHOST
+        ZFSROOT
+        ZFSSECOND
+        ZFSTRGT
+        ZPUSHTAG
+        ZPUSHMINKEEP
+        ZPUSHKEEP
+        ZPUSHLABEL
+        ZPUSHFILTER
+        PBSHOST
+        BACKUPSTORE
+        BACKUPSTOREPBS
+        BACKUPEXCLUDE
+        REPLEXCLUDE
+    )
+
+    MISSING_VARS=()
+    for var in "${REQUIRED_VARS[@]}"; do
+        if [[ -z "${!var:-}" ]]; then
+            MISSING_VARS+=("$var")
+        fi
+    done
+
+    if [[ "${#MISSING_VARS[@]}" -ne 0 ]]; then
+        log "Fehlende Konfigurationsvariablen:"
+        for var in "${MISSING_VARS[@]}"; do
+            log " - $var"
+        done
+        log "Breche ab – bitte Konfigurationsdatei prüfen."
+        exit 1
+    else
+        log "Alle erforderlichen Konfigurationsvariablen sind gesetzt."
+    fi
 fi
 
 # Funktionen
@@ -128,10 +172,17 @@ run_remote_updates() {
 }
 
 send_piggyback_data() {
+    # Falls SOURCEHOSTNAME leer ist, ueber SSH vom Zielhost ermitteln
+    if [[ -z "${SOURCEHOSTNAME:-}" ]]; then
+        log "SOURCEHOSTNAME is empty retrieving via SSH from $SOURCEHOST..."
+        SOURCEHOSTNAME=$(ssh "$SOURCEHOST" hostname)
+        log "Detected SOURCEHOSTNAME: $SOURCEHOSTNAME"
+    fi
+
     local combined_host="miyagi-${SOURCEHOSTNAME}-$(hostname)"
     local filename="90000_${combined_host}"
 
-    log "Do not forget to add a Host in CMK named: ${combined_host} (without Agent, Piggyback enabled)!"
+    log "Do nott forget to add a Host in CMK named: ${combined_host} (without Agent, Piggyback enabled)!"
     log "Creating piggyback file: $filename"
 
     {
@@ -157,12 +208,16 @@ run_pbs_backup() {
     # PBS-Storage ggf. aktivieren
     log "Checking if PBS storage '$BACKUPSTORE' is enabled on $SOURCEHOST..."
     if ssh root@"$SOURCEHOST" "pvesm status | grep -w '$BACKUPSTORE' | grep -q 'disabled'"; then
-        log "PBS storage '$BACKUPSTORE' is disabled. Attempting to enable..."
-        ssh root@"$SOURCEHOST" "pvesm set '$BACKUPSTORE' --disable 0 && sleep 2"
+        log "PBS storage '$BACKUPSTORE' is disabled. Attempting to enable...sleep 10 Sekunden"
+        ssh root@"$SOURCEHOST" "pvesm set '$BACKUPSTORE' --disable 0 && sleep 10"
+        pbs_enabled_by_script=true
     else
         log "PBS storage '$BACKUPSTORE' is already enabled."
+        pbs_enabled_by_script=false
     fi
 
+    vzdump_success=false
+
     # Hauptversuch mit --pbs-change-detection-mode
     if ssh root@"$SOURCEHOST" vzdump --pbs-change-detection-mode metadata \
         --node "$SOURCEHOSTNAME" --storage "$BACKUPSTORE" \
@@ -170,6 +225,7 @@ run_pbs_backup() {
         --notes-template '{{guestname}}'; then
 
         log "vzdump with change-detection-mode succeeded"
+        vzdump_success=true
 
     else
         log "Fallback: vzdump with change-detection-mode failed, trying without it..."
@@ -180,14 +236,21 @@ run_pbs_backup() {
             --notes-template '{{guestname}}'; then
 
             log "Fallback vzdump succeeded"
+            vzdump_success=true
 
         else
             log "ERROR: vzdump failed even after fallback"
         fi
     fi
 
-    # Monitoring-Output
-    if [[ $? -eq 0 ]]; then
+    # PBS-Storage wieder deaktivieren, wenn zuvor aktiviert und erfolgreich
+    if [[ "$vzdump_success" == true && "$pbs_enabled_by_script" == true ]]; then
+        log "Disabling PBS storage '$BACKUPSTORE' again on $SOURCEHOST..."
+        ssh root@"$SOURCEHOST" "pvesm set '$BACKUPSTORE' --disable 1"
+    fi
+
+    # Monitoring-Output für Checkmk
+    if [[ "$vzdump_success" == true ]]; then
         echo "0 DailyPBS - Daily Backup" > /tmp/cmk_tmp.out
     else
         echo "2 DailyPBS - Daily Backup FAILED" > /tmp/cmk_tmp.out
@@ -197,6 +260,7 @@ run_pbs_backup() {
     scp /tmp/90000_checkpbs root@"$SOURCEHOST":/var/lib/check_mk_agent/spool || log "Fehler beim SCP des Monitoring-Outputs"
 }
 
+
 run_maintenance() {
     if [[ "$(date +%u)" == "$MAINTDAY" ]]; then
         log "Running maintenance..."
@@ -240,7 +304,9 @@ run_scrub_stop_local() {
 }
 
 shutdown_if_requested() {
-    if [[ "$SHUTDOWN" == "yes" ]]; then
+    log "SHUTDOWN-Variable: '${SHUTDOWN:-nicht gesetzt}'"
+    #if [[ "${SHUTDOWN,,}" == "yes" ]]; then
+    if [[ "$(echo "$SHUTDOWN" | tr '[:upper:]' '[:lower:]')" == "yes" ]]; then
         send_piggyback_data
         log "Shutting down now..."
         shutdown now
@@ -250,6 +316,8 @@ shutdown_if_requested() {
 }
 
 main() {
+    log "Backup-Routine startet in 60 Sekunden..."
+    sleep 60
     log "Starting full backup routine..."
 
     SOURCEHOSTNAME=$(ssh "$SOURCEHOST" hostname)