One thing that is great is having a VIO media repository. You can
store AIX base media, mksysb images or any other .iso image in your VIO
There is a good post on how to do it here:
https://www.ibm.com/developerworks/mydeveloperworks/blogs/AIXDownUnder/entry/vio_server_virtual_media_library?lang=en I always schedule mksysb backups to go to a NIM server regularly. One thing I take a mksysb of is the VIO servers' rootvg.
The process is to: - Mount an NFS filesystem (ie /export/nim/mksysb) to the VIO server