anchor.diff:          disk = {
             :id => devices[:disks].count,
             :controller => controller[:id],
  -          :array => array[:id]
  +          :arrays => [array[:id]]
           }
   
           devices[:disks] << disk
  
positive.code:             :vendor => vendor,
              :model => model,
              :firmware_version => read_sysctl_file("#{device}/rev"),
              :size => size
            }
          end
        end
      end
    end
  
  
negative.code:     disk[:disks] = []
  
      find_direct_disks(disk)
  
      find_hp_disks(disk) if File.exist?("/usr/sbin/hpssacli")
      find_megaraid_disks(disk) if File.exist?("/usr/sbin/megacli")
      # aacraid
      # areca (/opt/areca/x86_64/cli64)
  
      find_md_arrays(disk)
  
      disk
    end
  