Installing Zhpf In A Switch Cascading Configuration; Uninstalling The Ficon/Zhpf Program Product - HP XP20000/XP24000 Operation Manual

Installing zHPF in a switch cascading configuration

In the storage system, when the zHPF PP is installed, the zHPF feature is enabled per channel path.
For point-to-point (direct) connection and single-switch connection, zHPF is dynamically enabled per
channel path. However, in cascading-switch connections, it is not automatically enabled (if you perform
option (1) or (2) from
be issued).
To install the zHPF function in cascading switch configurations, perform either Option (1) or Option
(2):
Option (1): Vary the channel path in the switch cascading configuration used for zHPF offline with
the CF CHP(Channel path 1-Channel path n),OFFLINEcommand, and then vary it online
with the CF CHP(Channel path 1-Channel path n),ONLINE command. If you always
keep the alternate path in the same path group when placing the channel path offline, you can
enable zHPF without stopping host access.
OR
Option (2): Power cycle the storage system.

Uninstalling the FICON/zHPF program product

CAUTION:
If the zHPF PP license is uninstalled while I/O is running, IFCC / PATH TAKEN OFFLINE / JOB ABEND
may occur.
Use the following procedure to uninstall zHPF.
1. Stop I/Os of all devices under the subsystem.
2. Uninstall the Program Product of zHPF.
3. Perform either Option (1) or Option (2):
Option (1): From one device under online CU, issue the DS QD,Device
number,VALIDATEcommand. Repeat this operation in all online CUs.
OR
Option (2): From one online channel path, issue the VARY PATH(Device number,
Channel path ID),ONLINEcommand. Repeat this operation in all online CUs and device
numbers.
"Enabling the zHPF function" on page 26 to enable zHPF, zHPF IO would not
XP Disk Array Mainframe Host Attachment and Operations Guide 27