[refactor] Changes to storage requirements

See #1047

setup/so-variables

@@ -28,9 +28,24 @@ mkdir -p /nsm
 filesystem_nsm=$(df /nsm | awk '$3 ~ /[0-9]+/ { print $2 * 1000 }')
 export filesystem_nsm
 
-free_space_root=$(df -Pk /nsm | sed 1d | grep -v used | awk '{ print $4 / 1048576 }' | awk '{ printf("%.0f", $1) }')
+free_space_nsm=$(df -Pk /nsm | sed 1d | grep -v used | awk '{ print $4 / 1048576 }' | awk '{ printf("%.0f", $1) }')
+export free_space_nsm
+
+free_space_root=$(df -Pk / | sed 1d | grep -v used | awk '{ print $4 / 1048576 }' | awk '{ printf("%.0f", $1) }')
 export free_space_root
 
+readarray -t mountpoints <<< "$(lsblk -nlo MOUNTPOINT)"
+readarray -t partitions <<< "$(lsblk -nlo NAME)"
+index=0
+for item in "${mountpoints[@]}"; do
+    if [[ $item == '/' ]]; then export root_part="${partitions[$index]}"
+    elif [[ $item == '/nsm' ]]; then 
+        export nsm_mount=1
+        export nsm_part="${partitions[$index]}"
+    fi
+    ((index++))
+done
+
 mkdir -p /root/installtmp/pillar/minions
 export temp_install_dir=/root/installtmp