http://www.pcservicecall.co.uk/layout.aspx...2-21b19b297f58}it does not say it just says daul layer ...............click hardware link above
if the DVD/cd rom drive is knakered in these Advent computer is very difficult to replace as
they do not have spare parts except for those people who have 3 years warrenty.
so if you are buying it take that into consideration and only pay well reduced price
as you will end up with a faulty computer you can not fix(as you can not get parts for it only second hand parts !! if you are lucky

)