Every HMC (from version V10RX) supports the option of easily installing virtual I/O servers directly via the HMC. This simplifies and speeds up the new installation of a virtual I/O server, but is also very helpful when it comes to restoring a virtual I/O server that is no longer functioning using a backup.
To install a virtual I/O server directly via the HMC, installation images (in ISO format) can be stored directly on an HMC. The images are saved on the HMC in the /extra/viosimages directory.
How to install a virtual I/O server using the HMC is described in Installation via the HMC.