Why starting a KVM Virtual Machine fails with "error: unable to open disk path /dev/sr0: No medium found."?

Solution Unverified - Updated -

Issue

  • When starting a VM with "virsh start <vm name>" after installation of the guest finished from the cd/dvd and the cd/dvd was ejected from the drive, it fails with the below error message.

    error: Failed to start <guest name>
    error: unable to open disk path /dev/sr0: No medium found.
    
  • If a cd/dvd is inserted to the driver, the vm will start fine without any problem.

Environment

  • Red Hat Enterprise Linux 6

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