HP StorageWorks XP24000/XP20000 for Compatible Parallel Access Volumes Software User Guide: Including Hyper PAV (T5237-96011, May 2011)
Setting the MIH Timer Value
The recommended MIH timer value for storage system Compatible PAV operations is 30 seconds.
The MIH timer values can be set in MVS/ESA, z/OS, or OS/390 either at IPL or after IPL.
To set the MIH timer value:
1. At IPL − Use the MIH parameter in the IECIOSxx parmlib member to set the MIH timer value
at IPL time. For the complete syntax of this parameter, see IBM document SC28-1752, OS/390
MVS Initialization and Tuning Reference.
2. After IPL − Use the SETIOS System Command after IPL to change or set the MIH timer value.
For the complete syntax of this command, see IBM document GC28-1781, OS/390 MVS
System Commands.
Preparing the Host System for Compatible PAV Operations 23