IBM eserver pSeries 690, Service Manual

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Powering Off and Powering On the System
This section provides procedures for powering off and powering on the system.
Powering Off the System With an HMC Attached and AIX Installed
The HMC user interface provides a power-off function to turn off the power to the system. If the system is
logically partitioned, AIX in each partition may be stopped individually to make repairs. If the system power
must be turned off, all of the logical partitions must be stopped. AIX provides hot-swap procedures for
adapters and devices that support hot-swap removal and installation. You do not have to shutdown a
partition that controls an adapter or device that supports hot-swap. Individual power components and fans
may be serviced with power on for power systems equipped with redundant power and cooling. Check
removal and installation procedures before servicing the system.
As the system goes off, the power LED on the operator panel starts blinking at a fast rate.
B0FF
appears in
the primary operator panel display.
When the power-off sequence is complete, the system goes into standby mode, as evidenced by the
following:
v OK
displays in the operator panel display.
v The operator-panel LED will start blinking at a slow rate.
v
The processor subsystem power LED will start blinking at a slow rate.
To completely remove power from a subsystem in the frame, use one of the following procedures based
on the presence or absence of the High Performance Switch (7045-SW4):
v If a High Performance Switch (7045-SW4) is not installed in the processor subsystem frame, input
power to a subsystem must be removed by turning off the UEPO switch and turning off the circuit
breakers on all optional IBF subsystems (if provided).
v
If a High Performance Switch (7045-SW4) is installed in the processor subsystem frame, input power to
a subsystem may be selectively removed from the processor subsystem, an I/O subsystem, or switch
subsystem using the HMC as described below:
The HMC user interface provides a power-off function to turn off the power to an individual subsystem.
For information about shutting down and powering off an individual subsystem, see
″
Basic System
Management Tasks
″
, located in the IBM Hardware Management Console for pSeries Installation and
Operations Guide .
Attention: If a High Performance Switch is present in the frame, using the UEPO switch to remove
power from a subsystem being serviced will remove power from ALL of the subsystems that are
receiving power from the frame. This may result in unintended outages and extended down time.
If you are servicing an individual I/O subsystem, refer to the information about deactivating a system’s
I/O drawers, found in
″
Basic System Management Tasks
″
, located in the IBM Hardware Management
Console for pSeries Installation and Operations Guide to remove 350 V power from both of the I/O
subsystem DCA UPIC cable connections. Before deactivating, ensure that you shut down the operating
system on all partitions that are using the resources of the I/O subsystem being serviced.
After deactivating the I/O subsystem, both the Power-In LED and the Power-Out LED on the front of the
I/O subsystem DCAs should be off. If not, call service support. If you are servicing the processor
subsystem, refer to the information about deactivating a managed system’s service processor found in
″
Basic System Management Tasks
″
, located in the IBM Hardware Management Console for pSeries
Installation and Operations Guide to remove 350 V power from the processor subsystem DCA UPIC
cable connections. Before deactivating, ensure that you shut down the operating system on all partitions
that are running on the processor subsystem being serviced.
After deactivating the processor subsystem, both the Power-In LED and the Power-Out LED on the front
of the processor subsystem DCA should be off. If not, do not continue. Call service support.
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Eserver
pSeries 690 Service Guide