Use the ZHPF statement to enable or disable the High Performance FICON® for IBM z Systems® (zHPF) facility on a system. If no ZHPF statement is specified, the zHPF facility is disabled on the system by default.

Specifies whether the zHPF facility is enabled or disabled on a system.
Default: NO
Note: A reserve is done synchronously regardless of any SYNCHRES=NO specification if ZHPF is enabled and the device operates I/O in Transport Mode.