What makes you think that these bays prevent the notebook that use them from having a normal internal notebook drive? It would seem very peculiar, to me, that Windows would keep on running for long if you needed to remove the only hard drive to watch a Blue-ray or CD-ROM movie. At the very minimum there would be a lot of bay swapping every time the HD was needed and wouldn't that be rather disruptive to watching your movie. Copying data from the CD-ROM/Blue-Ray to your HD would be a nightmare because buffers are generally not that big.