Device not supported . . . why?
I have a very modest home TV setup that has not changed for a year or so: Sony STR-DJ7200HP TV, Sony BDP-S5200 BD player, Sony STR-DH720 A/V receiver, Dish Network satellite box. If I have a DVD movie on a flash drive, I can insert the flash drive into the USB port on the Sony BD player or the USB port on the A/V receiver or the USB port on the front of the Dish box. If I navigate to the Video_TS folder on the flash drive, I can play the movie from the flash drive. I hardly do this every day, but occasionally it is useful.
Recently I purchased a small external USB DVD-R/W drive - HP-DVD-556S. The plan was to be able to play a DVD or DVD-R disc from this drive through one of the USB ports in the system. But when I have tried this, I consistently get the message 'Device not supported'. Why? I don't think this result is unique to the HP 556S, although that's possible. There are numerous external DVD-R/W drives available - many in the $10 price range.
Why would the Dish box or any of the system devices with USB ports treat this USB DVD-ROM drive differently from a USB flash drive? Is there some intermediate cable or gizmo that I'm missing? Has anyone else tried this? Results? This outcome is not the end of the world, but I am truly puzzled as to why it occurred. Suggestions? Thanks.