If it's not recognized, I believe that your DVD is not compatible ? There is 2 ways to plug it in, via the USB-SATA converter below of the PSU, and via the SATA connector on the motherboard near to the DVD Player slot. Try both and check if the hardware is recognized with the usual Linux commands.

If I remember well there is as well on the DE-OpenBlackHole 1.4 Support section in the JAM 5.x, the DVD support plugin or something like that to install.

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