Powering Server Cabinets On And Off - HP Rp7410 - Server - 0 MB RAM Administrator's Manual

Powering Server Cabinets On and Off

You can power on or power off server cabinets by using any one of the following procedures:
• "Powering Server Cabinets On and Off (Cabinet Power Switch)" (page 205)
• "Powering Server Cabinets On and Off (Service Processor)" (page 205)
When powering off a cabinet, you turn off 48-volt power to the cabinet thus causing all cells and
all I/O chassis to power off, and causing most fans to turn off.
Changes in cabinet power status do not affect the standby power that supplies system utilities
such as the service processor (GSP or MP) and keeps some fans running. These utilities and fans
can receive power as long as standby power is enabled.
CAUTION:
power off and power on cabinet 0 and cabinet 1 in such a way that both cabinets are off for an
overlapping interval.
If either Superdome 64-way cabinet is powered off then powered on while the other cabinet
remains on, then communications between the two cabinets is lost.
CAUTION:
The cabinet power switch and the PE command at the service processor Command menu do not
check whether system hardware is in use before powering it off.
Procedure 7-1 Powering Server Cabinets On and Off (Cabinet Power Switch)
Use the Virtual Front Panel to check status, and then use the cabinet power switch to manage
48-volt power for a cabinet with the cabinet hardware.
1. Login to the service processor for the server complex and access the Virtual Front Panel for
the system.
From the service processor Main menu, enter VFP to access the Virtual Front Panel menu,
then enter S to access the "system VFP" that displays the current status for all nPartitions.
2. Check the VFP status to see whether any cabinet hardware is running an operating system
(OS).
Any nPartition whose state is "OS heartbeat" is running an OS and thus should not have its
hardware powered off until after the OS is shut down.
Type ^b (Control-b) to exit the VFP.
3. Shut down the OS running on any cabinet hardware that you plan to power off.
4. Confirm that nobody else is using or servicing the cabinet hardware you plan to power on
or off.
Both physically inspect the hardware and check whether others are remotely accessing the
service processor (using the WHO command at the Command menu).
5. Access the cabinet hardware and flip the power switch (located on the front of the cabinet)
to the on or off position in order to power the cabinet on or off.
Procedure 7-2 Powering Server Cabinets On and Off (Service Processor)
Use the Virtual Front Panel, and then use the Command menu PE command to turn 48-volt
cabinet power on or off from the service processor (GSP or MP).
1. Login to the service processor for the server and access the Virtual Front Panel for the system.
From the service processor Main menu, enter VFP to access the Virtual Front Panel menu,
then enter S to access the "system VFP" that displays the current status for all nPartitions.
When you power on or off HP Superdome 64-way compute cabinets, you must
Before powering off system hardware, you first must check whether it is being used.
Powering Server Cabinets On and Off 205