IBM Secure Service Container
The IBM Secure Service Container was known as the IBM z Appliance Container Infrastructure (zACI) which is documented in the Systems Appliance Container Infrastructure (zACI) User's Guide, SC28-6970. The IBM Secure Service Container is a container technology through which you can quickly and securely deploy platform and software appliances on z17 and LinuxONE servers.
A Secure Service Container partition is a specialized container for installing and running specific firmware or software appliances. An appliance is an integration of operating system, middleware and software components that work autonomously and provide core services and infrastructures that focus on consumability and security.
The suggested practice is to use the latest available firmware for a Secure Service Container partition. The latest firmware for the HMC/SE uses Secure Service Container mode. For more information, see Systems Secure Service Container User's Guide, SC28-7062.