XP10000 (HITA737-96003, March 2007)

HPAV for z/OS user guide for the XP128/XP1024/XP12000/XP10000 17

NOTE: Administrator access to the Command View XP management station or XP Remote Web Console

is required to perform HPAV operations. Users without administrator access can only view HPAV

information.

Preparing the XP1024/XP128/XP12000/XP10000 for HPAV Operations

Changing the Controller Emulation Type

For HPAV operations, the XP1024/XP128/XP12000/XP10000 must have channel adapter (CHA)

packages for which the 2105 or 2107 emulation type is specified. Ask your HP representative to verify that

the correct CHA packages are installed. The HP representative can check and change the controller

emulation type in any one of the following ways:

• Add CHA packages and set the emulation type of these packages to 2105 (I-2105) or 2107 (I-2107).

• Use the System Tuning function on the SVP to change the emulation type to 2105 or 2107, and then

power off and power on the XP1024/XP128/XP12000/XP10000.

CAUTION: For XRC operations, do not intermix the 2105 or 2107 emulation type with other emulation

types within the same disk array. If the XP1024/XP128/XP12000/XP10000 is already performing XRC

operations, refer to Table 3 on page 14 for instructions on implementing HPAV with these functions on the

same disk array.

Enabling the HPAV Options

Set the controller emulation to 2105 or 2107 (see ”Changing the Controller Emulation Type” on page 17)

before enabling the HPAV options. You need to install the HPAV license key through Command View XP or

XP Remote Web Console and the HPAV option on each XP1024/XP128/XP12000/XP10000 that will

perform HPAV operations (see Managing license keys in the HP StorageWorks Command View XP User

Guide for XP Disk Arrays or the HP StorageWorks XP Remote Web Console User Guide for the specific

disk array).

Preparing the Host System for HPAV Operations

This section provides a brief description of the required preparations at the host system for HPAV operations

on the XP1024/XP128/XP12000/XP10000. Before performing HPAV operations, you must:

• Set the WLM operation mode on the host system (see page 17)

• Set the MIH timer value on the host system (see page 17)

Setting the WLM Operation Mode

WLM manages workloads on MVS systems and has two operation modes for static and dynamic HPAV:

• Goal mode: If you want to use dynamic HPAV, you must set the WLM operation mode to goal mode. In

goal mode, WLM can assign more or fewer aliases to a base device depending on the host I/O

activity to that device, thereby managing the system to meet the performance goal specified before

system operations began.

• Compatibility mode: If you want to use static HPAV, you must set the WLM operation mode to

compatibility mode. In compatibility mode, the number of aliases assigned to each base device does

not change as a result of changes in host I/O activity. WLM manages the system according to the

parameters in the IPS and ICS (IEAIPSxx and IEAICSxx).

Setting the MIH Timer Value

The recommended MIH timer value for XP1024/XP128/XP12000/XP10000 HPAV 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:

• At IPL – Use the MIH parameter in the IECIOSxx parmlib member to set the MIH timer value at IPL time.

• After IPL – Use the “SETIOS” System Command after IPL to change or set the MIH timer value.