diff --git a/xCAT-server/share/xcat/install/scripts/getinstdisk b/xCAT-server/share/xcat/install/scripts/getinstdisk
index 311a7294d..fcc517565 100644
--- a/xCAT-server/share/xcat/install/scripts/getinstdisk
+++ b/xCAT-server/share/xcat/install/scripts/getinstdisk
@@ -141,19 +141,8 @@ if [ -z "$install_disk" ]; then
         disk_wwn=$(echo $output_for_wwn | $utolcmd)
         output_for_path=$(IFS= ;echo $disk_info | grep DEVPATH | cut -d "=" -f2)
         disk_path=$(echo $output_for_path | $utolcmd)
-
-        # Work around the issue Pegas running on Power9 installation hang in anaconda 
-        # with "TypeError: argument of type 'NoneType' is not iterable", 
-        # after running of "udevadm info --attribute-walk --name=/dev/sda" in %pre section of kickstart 
-        cpu_model=$(awk '/model/ { print $NF }' /proc/cpuinfo)
-        p9_bool=$(grep POWER9 /proc/cpuinfo|head -n 1|awk '{print $3}')
-        anaconda --version >/dev/null  2>&1
-        if [ $? -eq 0 ] && [ "$cpu_model" = "0000000000000000" ] && [ "$p9_bool" = "POWER9" ]; then
-            disk_driver=""
-        else
-            disk_driver=$(udevadm info --attribute-walk --name=$disk | grep DRIVERS| grep -v '""'| grep -v '"sd"'|
+        disk_driver=$(udevadm info --attribute-walk --name=$disk | grep DRIVERS| grep -v '""'| grep -v '"sd"'|
                     \head -n 1| sed -e 's/[^"]*"//' -e 's/"//' | $utolcmd)
-        fi
 
         echo "[get_install_disk]The disk $disk information: "
         echo "[get_install_disk]    disk_wwn=$disk_wwn"