OpenVZ can access real CD/DVD discs and images of CD/DVD discs.
OpenVZ has no limitations on using multi-session CD/DVD discs. A virtual machine can play back audio CDs without any limitations on copy-protected discs.
If your server has a recordable optical drive, you can use it to burn CD or DVD discs in a virtual machine.
OpenVZ supports whatever CD/DVD disc images are supported by the guest OS.
