anchor.diff:      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
  
positive.code:             :vendor => vendor,
              :model => model,
              :firmware_version => read_sysctl_file("#{device}/rev"),
              :size => size
            }
          end
        end
      end
    end
  
  
negative.code:         disk = {
            :id => devices[:disks].count,
            :controller => controller[:id],
            :arrays => [array[:id]]
          }
  
          devices[:disks] << disk
  