empty_block_partition with raid

lib/install.sh

@@ -111,7 +111,8 @@ projects: []
 cluster: null
 EOF
         else
-            empty_block_partition=$(lsblk -o NAME,FSTYPE,GROUP --noheadings -p | grep -E ^.─ | grep disk | awk '{if($3=="") print $1}' | cut -d'/' -f3)
+            #empty_block_partition=$(lsblk -o NAME,FSTYPE,GROUP --noheadings -p | grep -E ^.─ | grep disk | awk '{if($3=="") print $1}' | cut -d'/' -f3)
+            empty_block_partition=$(lsblk -o NAME,PTTYPE,FSTYPE -ti -P | grep 'PTTYPE="" FSTYPE=""' | head -n1 | cut -d'"' -f2)
             if [[ -n "$empty_block_partition" ]]; then
                 echo "--------------------------------"
                 echo "use empty block partition /dev/$empty_block_partition for speed and optimization"