IBM i 830 Repair Manual page 944

Data Recovery and General System Information
16. Work with the customer to end all bus activity in the tower by performing
17. Power off the expansion tower or unit by performing the following:
Attention: If any console for a logical partition resides on the bus that you are
powering off, then powering off the bus will result in the loss of that partition's
console. If this condition exists for the partition that you are working in, you will
need to perform this procedure from the primary partition's console.
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iSeries Model 830, 840, SB2, and SB3 Problem Analysis, Repair and Parts V5R1
Note: If you have only the resource name, select the Locate Resource by
Resource Name option and display the Associated packaging resource(s)
for the selected resource. Use the Frame ID shown for the selected
resource in step 15d.
d. Select the Hardware contained within package option for the Frame ID of the
Expansion Unit. Ensure that all of the resources displayed match the
resources in the expansion tower or unit that you are powering off.
one of the following:
Note: If multiple logical partitions own IOPs on the bus, then the customer
will be directed to end all of the bus activity in each of those partitions.
v If the expansion tower or unit does not contain disk unit IOPs, work with
the customer to end all jobs and vary off all devices, lines, and controllers
for that expansion tower or unit.
v If the expansion tower or unit contains disk unit IOPs and the disk units
are not mirrored to disk units in other expansion towers or units, work
with the customer to end all communications activities to these disk units
by ending all subsystems.
v If the expansion tower or unit contains disk unit IOPs and these disk units
are mirrored to disk units in other expansion towers or units, you do not
need to end all subsystems. Mirroring will assist during the service action.
v If the system has a non-redundant (single hub configuration) OptiConnect
bus, work with the customer to end all jobs and vary off the QSOC
resources on the affected system.
Note: Use the WRKOPCACT command to work with the QSOC resources on
the affected system.
v If the system has a redundant (dual hub configuration) OptiConnect bus,
you do not need to end subsystems or vary off the resources. Redundancy
will assist during the service action.
a. Use the system console and get to the SST or DST menu. Select the Start a
service tool option.
b. Select the Hardware service manager option.
c. Select the Packaging Hardware Resources (systems, frames, cards etc.) option.
d. From the Packaging Hardware Resources display, specify the Concurrent
Maintenance option for the expansion tower or unit that you are powering
off, then press the power off PF key.
Note: If resources on the bus or buses are active, you will receive a
message indicating which resources are in use and the expansion
tower or unit will not power off. Return to step 16 of this procedure
and ensure that all resources on the bus are varied off. Follow the
instructions on the screen for locating the active resources and
varying them off.