Added draft for storage encryption procedures

scripts/base.sh

@@ -65,6 +65,23 @@ error(){
   exit 1;
 }
 
+# Routine to echo the full sd-card-path
+set_device_path(){
+  info "Available devices:"
+  ls -lasi /dev/ | grep -E "sd|mm"
+  question "Please type in the name of the device: /dev/" && read -r device
+  device_path="/dev/$device"
+  if [ ! -b "$device_path" ]
+    then
+      error "$device_path is not valid device."
+  fi
+  # @see https://www.heise.de/ct/hotline/Optimale-Blockgroesse-fuer-dd-2056768.html
+  OPTIMAL_BLOCKSIZE=$(expr 64 \* "$(sudo cat /sys/block/$device/queue/physical_block_size)") &&
+  info "Device path set to: $device_path" &&
+  info "Optimal blocksize set to: $OPTIMAL_BLOCKSIZE" ||
+  error
+}
+
 HEADER(){
   echo
   echo "${COLOR_YELLOW}The"