IBM eServer BladeCenter 8677, Installation And User Manual

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module 2, is designated as the second connection (or Local Area Connection
2) by Microsoft Windows 2000 but is designated as the first connection (or
eth0) by Red Hat Linux Version 7.3. You can verify the designations through
your operating system settings or by testing:
1. Install only one switch module, in switch bay 1.
2. Enable only one of the Ethernet controllers on the blade server. Make
note of the designation the blade server operating system has for the
controller.
3. Ping an external computer on the network connected to the switch
module.
If you can ping the external computer, the Ethernet controller you enabled is
the upper controller in the blade server and is associated with Ethernet
switch 2.
Power modules
Your BladeCenter unit comes with one pair of 220-volt hot-swap power modules in
power bays 1 and 2 that provides power to all the BladeCenter modules and to
blade bays 1 through 6. The BladeCenter unit supports a second pair of power
modules in power bays 3 and 4 that provides power to blade bays 7 through 14.
Each pair of power modules is redundant; if a power module fails, the remaining
power module continues to supply power. If only one power module of a pair is
present, it can be installed in either bay of the pair; there is no redundancy.
To provide true redundant power, BladeCenter power modules 1 and 3 must
connect to a different AC power source than power modules 2 and 4. Connect
BladeCenter power modules 1 and 3 to a different PDU than power modules 2 and
4; then, connect each PDU to an AC power source (building power source or
service entrance) that is controlled by a separate circuit breaker.
The following table summarizes the application for each power module
Bays Power module function
1 and 2 Provides power to all the BladeCenter modules and to blade bays 1 through 6
3 and 4 Provides power to blade bays 7 through 14
Power modules are not needed in bays 3 and 4 until you begin installing blade
servers and options in blade bays 7 through 14.
Note: If you install a blade server that has a storage expansion unit option
attached in blade bay 6, the option will use blade bay 7; power modules will
be required in power bays 1, 2, 3 and 4.
Each active power module supplies 12 volts of power to the blade bays it services.
Important: Plug one end of each power-module power cord into the power module;
plug the other end of the power cord into a 220-volt power distribution unit (PDU).
Blower modules
Your BladeCenter unit comes with two hot-swap blowers for cooling redundancy.
The blower speeds vary depending on the ambient air temperature at the front of
the BladeCenter. If the ambient temperature is 72°F or below, the BladeCenter
blowers will run at 30% of their maximum rotational speed, increasing their speed
as required to control internal BladeCenter temperature. If the ambient temperature
Chapter 2. Installing options
17