You can back up the VIO Server to a file, a tape device, CD, or DVD drive.

As memory is dynamically managed among multiple LPARs, the Hypervisor has to use a paging device to back up the excess memory that it cannot back up using physical memory from the Shared memory pool.

The feature would be even better if the built-in speakers weren’t on the back of the device, muffling the sound if you place it screen up on a flat surface.