diff --git a/storage_helper.sh b/storage_helper.sh
index be90081765a47b4d3755496430058a039fbfae5f..cbcda54c9d33248ed05457436ddf8fede6e95410 100755
--- a/storage_helper.sh
+++ b/storage_helper.sh
@@ -131,6 +131,7 @@
         #local _srv=$1
         #_getAllLogs | sort | grep "\[$_srv\]" | grep ACCEPTED | tail -1 | cut -f -2 -d " "
 
+        local tsBackupStart=
         test -r "$sStatusDir/${sBackupClient}" && . "$sStatusDir/${sBackupClient}"
         echo $tsBackupStart
     }
@@ -141,6 +142,7 @@
         # test -r "${sStatusDir}/${sBackupClient}_end" && stat -c %Y "${sStatusDir}/${sBackupClient}_end"
         # local _srv=$1
         # _getAllLogs | sort | grep "\[$_srv\]" | grep REMOVED | tail -1 | cut -f -2 -d " "
+        local tsBackupEnd=
         test -r "$sStatusDir/${sBackupClient}" && . "$sStatusDir/${sBackupClient}"
         echo $tsBackupEnd
     }
@@ -149,6 +151,7 @@
     # global  string  sBackupClient  FQDN of current server
     function _getLastBackupstatus(){
         if [ -r "${sStatusDir}/${sBackupClient}" ]; then
+          local backupRc=
           . "${sStatusDir}/${sBackupClient}"
           echo $backupRc
         else
@@ -158,6 +161,7 @@
     # get size of backup data from status file
     # global  string  sBackupClient  FQDN of current server
     function _getBackupsize(){
+        local size=
         test -r "$sStatusDir/${sBackupClient}" && . "$sStatusDir/${sBackupClient}"
         echo $size
     }
@@ -220,7 +224,7 @@
             echo "# $( date """+%Y-%m-%d %H:%M:%S""" )" >> "$sTouchfile"
             echo "tsBackupEnd=$( date +%s )" >> "$sTouchfile"
             echo "backupRc=$_status" >> "$sTouchfile"
-            echo "size=$( du -hs ${sBackupBasedir}/*/$sBackupClient 2>/dev/null )" >> "$sTouchfile"
+            echo "size='$( du -hs ${sBackupBasedir}/*/$sBackupClient 2>/dev/null )'" >> "$sTouchfile"
             mv "$sTouchfile" "$sStatusDir/${sBackupClient}"
         else
             echo INFO: server [$sBackupClient] had no reserved slot
@@ -283,7 +287,7 @@
             typeset -i local iend="$( _getLastBackupend )"
             typeset -i local bIsRunning=$( _isRunning )
             typeset -i local iLastStatus=$( _getLastBackupstatus )
-            size=$( _getBackupsize )
+            local size=$( _getBackupsize )
 
             local tstart=$( date +"%Y-%m-%d %H:%M:%S" -d @${istart} )
             local tend=$( date +"%Y-%m-%d %H:%M:%S" -d @${iend} )