CentOS virt - Dec 2016 - dvd not whitelisted ???

Hi All,

Scientific Linux 7.2

I am drawing a blank on Google here.

I am, trying to boot a qemu-kvm virtual machine off
of /dev/sr0 (my DVD).  But I get the following error

      Error starting domain: internal error: qemu unexpectedly
      closed the monitor: 2016-12-22T00:00:30.330333Z qemu-kvm:
      -drive file=/dev/sr0,format=raw,if=none,media=cdrom,
      id=drive-sata0-0-0,readonly=on: could not open disk
      image /dev/sr0: Driver 'host_cdrom' is not whitelisted

"Not whitelisted" ????

What am I doing wrong?

Many thanks,
-T

-- 
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Computers are like air conditioners.
They malfunction when you open windows
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