# File test/backup/DOSDisk.rb, line 87
        def dump_catalog
                s=""
        files.keys.sort.each { |file_name|             
                        file=files[file_name]        
                        s<< "#{file.locked ? '*':' '}#{file.file_type} #{sprintf('%04d',file.contents.length)} #{file.filename}\n"
                }
                s
        end