Preparing to use HyperPAV storage subsystems using the HYPERPAV statement in the IECIOSxx parmlib member

The HYPERPAV=YES|NO statement in parmlib member IECIOSxx lets you dynamically integrate HyperPAV-capable storage servers into your production sysplex. The recommended way to do this is as follows:

Apply all HyperPAV maintenance, but wait until step 4 to IPL the maintenance.
Make sure that all systems in sysplex are in operation with HYPERPAV=NO in effect in parmlib member IECIOSxx. Note that the default is HYPERPAV=NO, so that if you do not specify HYPERPAV, you will get HYPERPAV=NO.
Install new HyperPAV-capable storage servers or upgrade existing storage servers with HyperPAV capability. Following an upgrade, the HyperPAV License Feature must be activated using either the DS8000® command line interface or the graphical user interface, which is the suggested way.
Activate HyperPAV on a single system in the sysplex. Then IPL the HyperPAV maintenance, with an IECIOSxx parmlib member that includes a HYPERPAV=YES keyword. You can also dynamically activate HyperPAV using the SETIOS HYPERPAV=YES system command.
Note that if you use the SETIOS HYPERPAV=YES command, it should be performed during periods of low system utilization, as it may take considerable time to convert all capable control units to HyperPAV mode.

If you used SETIOS to go to HYPERPAV=YES mode, you should update the IECIOSxx parmlib member to HYPERPAV=YES if you want to remain in HyperPAV mode across future IPL's.
Perform step 4 to activate HyperPAV mode on the other systems in the sysplex.
When all systems in the sysplex are operating in HyperPAV mode, you can analyze the converted control units. You can use RMF™ or a similar product to determine the proper number of alias devices for each control unit. During peak intervals, RMF shows peak alias usage information for each HyperPAV subsystem. With this information, you can begin to reduce the number of aliases configured for each control unit. Aliases can be added or deleted using the Hardware Configuration Dialog. Note that all systems must be HyperPAV-capable before you reduce the number of aliases.