HP XP P9500 Storage - Manual (Page 24)

2. Issue the following commands from z/VM system console to all alias devices that are used
for Hyper Parallel Access Volumes in the corresponding CU to enable Hyper Parallel Access
Volumes:
DET alias_device_number1-alias_device_number2
VARY OFFLINE alias_device_number1-alias_device_number2
SET CU HYPERPAV ssid1-ssid2
VARY ONLINE alias_device_number1-alias_device_number2
ATT alias_device_number1-alias_device_number2*
3. Enable Hyper Parallel Access Volumes on the z/OS with the following command from the
host system console:
SETIOS HYPERPAV=YES
4. Issue the following command from the system console of z/OS to all base devices in the
corresponding CU to make those base devices online:
V base_device_number1-base_device_number2,ONLINE
Setting the MIH timer value
The recommended MIH timer value for Parallel Access Volumes operations is 30 seconds. The MIH
timer values are set in MVS/ESA®, z/OS®, or OS/390® at IPL (initial program load) or after
IPL.
At IPL, use the MIH parameter in the IECIOSxx parmlib member to set or modify the MIH timer
value. For the complete syntax of this parameter, see the IBM document MVS Initialization and
Tuning Reference (SC28-1752).
After IPL, use the “SETIOS” system command to set or modify the MIH timer value. For the complete
syntax of this command, see the IBM document MVS System Commands (GC28-1781).
24 Preparing for Parallel Access Volumes operations