diff --git a/miyagi-backup.sh b/miyagi-backup.sh
index c564470..870f308 100644
--- a/miyagi-backup.sh
+++ b/miyagi-backup.sh
@@ -3,13 +3,6 @@ set -euo pipefail
 IFS=$'\n\t'
 
 PATH="/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin"
-
-if [[ "${1:-}" == "help" ]]; then
-    echo "Verfügbare Funktionen:"
-    declare -F | awk '{print " - " $3}'
-    exit 0
-fi
-
 SCRIPT_NAME=$(basename "$0")
 LOGFILE="/var/log/${SCRIPT_NAME%.sh}.log"
 
@@ -18,11 +11,14 @@ log() {
 }
 
 usage() {
-    echo "Usage: $0 -c /path/to/config"
+    echo "Usage:"
+    echo "  $0 -c /path/to/config                 # Full backup run"
+    echo "  $0 [function]                         # Run individual function"
+    echo "  $0 help                               # Show available functions"
     exit 1
 }
 
-# Argument parsing
+# Konfigurationsdatei initialisieren (nur wenn -c übergeben)
 CONFIG_FILE=""
 while getopts "c:" opt; do
     case "$opt" in
@@ -31,13 +27,15 @@ while getopts "c:" opt; do
     esac
 done
 
-if [[ -z "$CONFIG_FILE" || ! -f "$CONFIG_FILE" ]]; then
-    log "ERROR: Configuration file is missing or invalid."
-    usage
+# Bei Einzelaufruf muss Konfiguration geladen sein
+if [[ -n "${CONFIG_FILE:-}" ]]; then
+    if [[ ! -f "$CONFIG_FILE" ]]; then
+        log "ERROR: Configuration file not found: $CONFIG_FILE"
+        exit 1
+    fi
+    source "$CONFIG_FILE"
 fi
 
-source "$CONFIG_FILE"
-
 # Funktionen
 
 write_zsync_config() {
@@ -72,12 +70,16 @@ run_zsync() {
 }
 
 run_updates() {
+    log "Running updates..."
+    apt update && apt dist-upgrade -y
+    apt autopurge -y
+}
+
+run_remote_updates() {
     if [[ "$UPDATES" == "yes" ]]; then
-        log "Running system updates..."
-        apt update && apt dist-upgrade -y
-        apt autopurge -y
+        ssh "$PBSHOST" apt update && apt dist-upgrade -y
     else
-        log "No system updates configured"
+        log "Remote updates disabled"
     fi
 }
 
@@ -97,29 +99,45 @@ run_pbs_backup() {
         --exclude "$BACKUPEXCLUDE" --mode snapshot --all 1 \
         --notes-template '{{guestname}}'
 
-    local status=$?
-    if [[ $status -eq 0 ]]; then
+    if [[ $? -eq 0 ]]; then
         echo "0 DailyPBS - Daily Backup" > /tmp/cmk_tmp.out
     else
         echo "2 DailyPBS - Daily Backup FAILED" > /tmp/cmk_tmp.out
     fi
+
     ( echo "<<<local>>>" ; cat /tmp/cmk_tmp.out ) > /tmp/90000_checkpbs
     scp /tmp/90000_checkpbs root@"$SOURCEHOST":/var/lib/check_mk_agent/spool
 }
 
 run_maintenance() {
     if [[ "$(date +%u)" == "$MAINTDAY" ]]; then
-        log "Running maintenance tasks..."
+        log "Running maintenance..."
         PRUNEJOB=$(ssh "$PBSHOST" proxmox-backup-manager prune-job list --output-format json-pretty | grep -m 1 "id" | cut -d'"' -f4)
         ssh root@"$PBSHOST" proxmox-backup-manager prune-job run "$PRUNEJOB"
         ssh root@"$PBSHOST" proxmox-backup-manager garbage-collection start "$BACKUPSTOREPBS"
+        ssh root@"$PBSHOST" proxmox-backup-manager verify backup
     else
-        log "No maintenance today."
+        log "No maintenance scheduled for today."
+    fi
+}
+
+run_scrub() {
+    ssh root@"$SOURCEHOST" zpool scrub -s "$ZPOOLSRC"
+    zpool scrub -s "$ZPOOLDST"
+}
+
+shutdown_if_requested() {
+    if [[ "$SHUTDOWN" == "yes" ]]; then
+        send_piggyback_data
+        log "Shutting down now..."
+        shutdown now
+    else
+        log "No shutdown requested."
     fi
 }
 
 main() {
-    log "Starting Miyagi backup process..."
+    log "Starting full backup routine..."
 
     SOURCEHOSTNAME=$(ssh "$SOURCEHOST" hostname)
 
@@ -127,19 +145,20 @@ main() {
     run_zsync
     run_updates
     run_maintenance
+    run_scrub
     run_pbs_backup
-
-    if [[ "$SHUTDOWN" == "yes" ]]; then
-        send_piggyback_data
-        shutdown now
-    elif [[ "$BACKUPSERVER" == "no" ]]; then
-        log "No backup configured and no shutdown requested. Exiting."
-        exit 0
-    fi
+    run_remote_updates
+    shutdown_if_requested
 }
 
-if [[ "${1:-}" == "" ]]; then
-    main
-else
+# Funktionsbasierter Aufruf
+if [[ "${1:-}" == "help" ]]; then
+    echo "Verfügbare Funktionen:"
+    declare -F | awk '{print " - " $3}' | grep -v "^ - _"
+    exit 0
+elif [[ "${1:-}" =~ ^[a-zA-Z0-9_]+$ && "$(type -t "$1")" == "function" ]]; then
+    shift
     "$@"
-fi
\ No newline at end of file
+else
+    main
+fi