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Power configuration and power throttling
Each blade server is powered by two BladeCenter redundant power-supply
modules. By enforcing a power policy known as power domain oversubscription, the
BladeCenter unit can share the power load between two power modules to ensure
efficient power for each device in the BladeCenter unit. This feature depends upon
the BladeCenter power modules and may be automatically enforced when the initial
power is applied to the BladeCenter unit or when a blade server is inserted into the
BladeCenter unit. You can configure and monitor the power environment by using
the Advanced Management Module.
For more information about configuring power, see the Advanced Management
Module documentation.
Boot support
The QS22 blade server can boot from:
v The optical drive of the BladeCenter unit media tray
v The optional modular flash drive
v The IBM BladeCenter Boot Disk System attached to the BladeCenter unit
v A storage device attached to the network
v If installed in a BladeCenter S unit, the local SAS drives of the unit
Support for SAS storage
You can install the optional SAS expansion card for access to SAS storage.
Apart from the expansion card on the blade server, you need one or two IBM
BladeCenter SAS Connectivity Modules in the rear of the BladeCenter unit, and
various options to attach IBM BladeCenter Boot Disk System to the connectivity
modules.
Storage can be attached through the external SAS host controller. The blade server
supports the SAS drives of the IBM BladeCenter Boot Disk System. Check the IBM
BladeCenter support Web site for details of supported SAS drives at
http://www.ibm.com/systems/bladecenter/support/.
If your QS22 blade server is installed in a BladeCenter S unit, you can also access
the local SAS drives of the BladeCenter S unit.
Support for local storage
You can install the optional modular flash drive for system boot or local storage.
Support for IBM Director
IBM Director has an interface to the Advanced Management Module. You can use
IBM Director to perform network and system management tasks for your QS22
blade servers.
For more information about IBM Director, see the documentation on the IBM
Director CD that comes with the blade server, the IBM Director Information Center
at http://publib.boulder.ibm.com/infocenter/eserver/v1r2/topic/diricinfo_all/
diricinfoparent.html, and the IBM xSeries
http://www.ibm.com/systems/management/, which presents an overview of IBM
Systems Management and IBM Director.
®
Systems Management Web page at
Chapter 1. Introduction
3
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