diff --git a/xCAT-IBMhpc/share/xcat/IBMhpc/aixcleanjitter b/xCAT-IBMhpc/share/xcat/IBMhpc/aixcleanjitter
index 0cbcf7d78..fa7c13046 100755
--- a/xCAT-IBMhpc/share/xcat/IBMhpc/aixcleanjitter
+++ b/xCAT-IBMhpc/share/xcat/IBMhpc/aixcleanjitter
@@ -145,9 +145,9 @@ sleep 1
 /usr/sbin/schedo -F -o tick_sync=1
 /usr/sbin/schedo -F -o big_tick_size=1
 
-grep -q cosched3 /etc/poe.priority
+grep -q cosched3 /etc/poe.priority 2> /dev/null
 if [[ $? -ne 0 ]] then
-    echo '*  cosched1    18    100    97    10' >> /etc/poe.priority
+    echo '*  cosched1    18    100    97    10' > /etc/poe.priority
     echo '*  cosched2    13    100    99.5  10' >> /etc/poe.priority 
     echo '*  cosched3    13    100    99     3' >> /etc/poe.priority
     chmod 644 /etc/poe.priority