lib/getch/device.rb in getch-0.7.3 vs lib/getch/device.rb in getch-0.11.0

@@ -50,9 +50,11 @@
     end
 
     private
 
     def load_devs
+      raise ArgumentError, 'No disk for root, use --disk DISK.' unless OPTIONS[:disk]
+
       if File.exist? @file
         DEVS.merge! YAML.load_file @file
       else
         save
         warn "Init devs at #{@file}"