diff --git a/usr/share/archboot/installer/setup b/usr/share/archboot/installer/setup
index 97fc904b0..dac576cc9 100755
--- a/usr/share/archboot/installer/setup
+++ b/usr/share/archboot/installer/setup
@@ -460,9 +460,15 @@ check_dm_devices() {
 # - show device mapper devices 
 dm_devices() {
     check_dm_devices
+    for i in $(dmraid -s -c); do
+        EXCLUDE_DMRAID=""
+        if [ "$(echo $i | grep '_')" ]; then
+             EXCLUDE_DMRAID="-v $EXCLUDE_DMRAID "
+        fi
+    done
     if [ -d /dev/mapper ] ; then
-        for devpath in $(ls /dev/mapper 2>/dev/null | grep -v control); do
-            if ! [ "$(dmraid -s -s -c | grep $devpath$)" -o "$(ls $partofcrypt 2>/dev/null | grep /dev/mapper/$devpath$)" -o "$(ls $partoflvm 2>/dev/null | grep /dev/mapper/$devpath$)" -o "$(ls $partofraid 2>/dev/null | grep /dev/mapper/$devpath$)" ]; then
+        for devpath in $(ls /dev/mapper 2>/dev/null | grep -v control $EXCLUDE_DMRAID); do
+            if ! [ "$(ls $partofcrypt 2>/dev/null | grep /dev/mapper/$devpath$)" -o "$(ls $partoflvm 2>/dev/null | grep /dev/mapper/$devpath$)" -o "$(ls $partofraid 2>/dev/null | grep /dev/mapper/$devpath$)" ]; then
                 echo "/dev/mapper/$devpath"
                 [ "$1" ] && echo $1
             fi
@@ -1270,7 +1276,7 @@ findpv()
                     [ "$1" ] && echo $1
                 fi
         fi
-    do
+    done
 }
 
 getavailablepv()