Technical data

Listing and Managing Server Hardware
Powering Server Cabinets On and Off
HP System Partitions Guide: Administration for nPartitions, rev 5.1 310
Powering Server Cabinets On and Off
You can power on and power off the cabinets within a server complex
either by using the main power switch on the front of the cabinet, or by
using the service processor Command menu.
You can use the following procedures:
• Powering Server Cabinets On and Off [Power Switch] on page 311
This procedure (Virtual Front Panel, and using the cabinet power
switch) turns a cabinet’s 48-volt power on or off using cabinet
hardware.
• Powering Server Cabinets On and Off [Service Processor] on page 312
This procedure (Virtual Front Panel, and Command menu’s PE
command) turns a cabinet’s 48-volt power on or off using the service
processor (GSP or MP).
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.
CAUTION When you power on or off HP Superdome 64-way compute cabinets, you
must 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 Before powering off system hardware, you first must check whether it is
being used.
The cabinet power switch and the service processor Command menu’s PE
command do not check whether system hardware is in use before
powering it off.