IBM Power System POWER7 Series Common Service Procedures page 152

4. Messages that may be generated on the HMC during the procedure refer to specific partitions by their
partition IDs. A partition's ID is a numeric value that represents the order in which the partitions
were created. The partitions listed in the Server Management content area are not necessarily listed in
order of partition ID. A partition's ID is listed under the General tab in the Partition Properties.
Perform the following with the assistance of the customer:
1. If you have not already done so, record the expansion unit's location code and machine
type-model-serial numbers (MTMS).
2. Can the expansion unit be powered off with the server powered on (the server is HMC-managed),
and does the customer want to perform the procedure with the server powered on?
No: The expansion unit must be powered off by powering off the server. See Powering on and
powering off a system for instructions on powering off the server, then return to the procedure
that sent you here.
Yes: Go to step 3.
Note: If the activated firmware level of the server to which the expansion unit is attached is lower
than SF235, there is a small chance that bus numbers for the PCI buses in the expansion unit will
change if the I/O backplane in the expansion unit is replaced with the server powered off. If this
occurs on a server with multiple logical partitions, the I/O slot resources in the expansion unit will
have to be reassigned to the appropriate partitions. Additionally, AIX logical resource names of the
I/O resources in the expansion unit may change requiring some manual reconfiguration in the
partition. If the I/O backplane is replaced with the server powered off, be prepared to perform these
reconfiguration activities after the procedure. If the I/O backplane is replaced with the server
powered on, either to firmware standby or firmware running, reconfiguration will not be required.
If it is desirable to replace the I/O backplane with the server powered off, but configuration changes
cannot be tolerated, powering off the server and then powering it on to firmware standby state
before performing the procedure might be a satisfactory alternative.
The activated firmware level of the server is displayed in the upper right corner of the ASMI
welcome page.
3. Verify that the expansion unit being powered off is the correct one. If the expansion unit has an
alphanumeric display on the control panel, you can verify that the type, model, and serial number of
the expansion unit displayed on the user interface match that shown on the control panel display.
Otherwise, you can activate the identify indicator on the expansion unit. To activate the Identify
indicator on the expansion unit, do the following steps for your particular interface:
v From the HMC V7 and later, use Select managed system > Operations > LED Status > Identify
LED. Select the desired expansion unit and use Activate LED to turn on the LED and thus verify
that the tower is the correct one. Then, use Deactivate LED to turn off the LED.
v From the HMC V6R1.3 or earlier, use Service Focal Point > Service Utilities > Identify LED
processing.
v From the IBM Systems Director Management Console (SDMC), complete the following steps:
a. On the Welcome page, under the Resources tab, select the server.
b. Click Actions > Service and Support > Hardware > Identify LED.
c. Select the desired expansion unit and click Activate LED to turn on the LED and thus verify
that the expansion unit is the correct one. Then, click Deactivate LED to turn off the LED.
v From IBM i use System (or Dedicated) Service Tools > Start a service tool > Hardware service
manager > Packaging hardware resources > Concurrent maintenance > Toggle LED blink off/on.
v Are you powering off the correct expansion unit?
No: Choose the correct expansion unit. Then perform this procedure again.
Yes: Go to step 4.
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