Today, I found evidence on the web!
http://publib.boulder.ibm.com/infocenter/eserver/v1r3s/index.jsp?topic=/iphb
p/systembrand.htm
or
http://tinyurl.com/2yglvj
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Setting the system brand
Set and view the system brand.
The system brand identifies your system using a 2-character system brand as
shown in the following table.
System brand Description
D0 IBM® Storage
I0 IBM eServer? i5
P0 IBM eServer p5 and IBM eServer OpenPower?
Changing the system brand is only allowed if the value has not been set, or
if the current value is P0 and the new value will be D0. Additionally, for
IBM Storage, each of the systems that constitutes the storage facility must
be set to D0 for storage to be accessible online.
Note: You cannot boot the system until valid values are entered for all
fields. Use this procedure only under the direction of your service
provider.
To perform this operation, your authority level must be one of the
following:
* Administrator
* Authorized service provider
To change the system brand, complete the following steps:
1. On the ASMI Welcome pane, specify your user ID and password, and click
Log In.
2. In the navigation area, expand System Configuration and Program Vital
Product Data.
3. Select System Brand. In the right pane, the current system brand is
displayed. If the system brand has not been set, you will be prompted to
enter the system brand. Enter the values as specified by your service
provider.
4. Click Continue. Your system brand setting and the following notice are
displayed:
Attention: Once set, this value cannot be changed unless it is 'P0',
and then only to 'D0'.
5. Click Save settings to update the system brand and save it to the VPD.
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