DRY'er Object Initialization in Ruby

Is there a more 'DRY' way to do the following in ruby?

#!/usr/bin/env ruby

class Volume
    attr_accessor :name, :size, :type, :owner, :date_created, :date_modified, :iscsi_target, :iscsi_portal

    SYSTEM = 0
    DATA = 1

    def initialize(args={:type => SYSTEM})
      @name = args[:name]
      @size = args[:size]
      @type = args[:type]
      @owner = args[:owner]
      @iscsi_target = args[:iscsi_target]
      @iscsi_portal = args[:iscsi_portal]
    end

    def inspect
      return {:name => @name,
              :size => @size,
              :type => @type,
              :owner => @owner,
              :date_created => @date_created,
              :date_modified => @date_modified,
              :iscsi_target => @iscsi_target,
              :iscsi_portal => @iscsi_portal }
    end

    def to_json
      self.inspect.to_json
    end

end