# File lib/deltacloud/drivers/ec2/ec2_driver.rb, line 441
        def storage_volumes(credentials, opts={})
          ec2 = new_client( credentials )
          volume_list = (opts and opts[:id]) ? opts[:id] : nil
          safely do
            ec2.describe_volumes(volume_list).collect do |volume|
              convert_volume(volume)
            end
          end
        end