Changing disk configurations – HP XP P9500 Storage User Manual

Page 74

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You can use the

KTDCTDEV

command to change the tiering policy of volumes applied back to the

storage system to the default before deleting the volume from the tiering policy group definition file.
After you change the tiering policy back to the default, the status of the volume to delete is as follows:

•

Tiering policy level: 0

•

New-page assignment tier: MIDDLE

•

Whether to execute tier relocation: Y

You do not need to use this command if you want to continue to use the tiering policy that is currently
applied.

Reference scripts

Refer to the sample script KTDEMO05 for details on how to create scripts for changing the tiering
policy of volumes back to the default by using the

KTDCTDEV

command.

• KTDCTDEV

• KTIMPORT

• KTQRYDEV

• Format of tiering policy information CSV files

, page 127

Changing disk configurations

The disk configuration might be drastically changed if, for example, a storage system is replaced or
volume device numbers are changed by modifying an I/O definition. In such a case, you need to
delete the disk configuration definition file, and then re-create the disk configuration definition file
and the tiering policy group definition file.

Prerequisites

•

To define a tiering policy group by specifying an SMS storage group or volume serial number,
place the volumes online to allow the volume serial numbers to be detected.

To change the disk configuration:

Delete the disk configuration definition file.

Specify the scan range, and then execute the

KTSCAN

command.

The command acquires disk configuration information, and stores it in the host-discovered array
structure and host-discovered array index structure.

Execute the

KTSTORE

command.

The data in the host-discovered array structure is saved in the disk configuration definition file.

If necessary, modify the tiering policy information CSV file.

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