The various promo videos seems to indicate the DVD/Blu-Ray drive on the BU/CU/DU models are detachable, but it is not mentioned anywhere.
Is it being powered by the USB?
Can it be detached into two separate pieces? How can I detach it?
The optical disk drive for the IdeaCentre Q180 is detachable and is powered by the USB.
One forum contributor shared the following tip:
"They are snapped together like the calculators, so you have to be a bit daring the first few times. First remove the USB adapter on the back, then apply some shear stress on the two parts, and avoid applying force on the ON/OFF and eject buttons on top of the units while separating them. "