IBM 8677 - BladeCenter Rack-mountable - Power..., Руководство по техническому обслуживанию и ремонту

Страница: 46 / 150

Power modules
Note: The IBM BladeCenter E type 8677 and 1881 chassis must be configured to
support 2320-watt power modules. See the IBM BladeCenter E 2320 Watt Power
Modules Installation Guide for specific information and instructions.
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 either power module fails, the
remaining power module continues to supply power, but there is no redundancy; the
failed power module must be replaced as soon as possible.
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
is above 72°F, the blowers will run at 80% of their maximum rotational speed,
increasing their speed as required to control internal BladeCenter temperature. If a
blower fails, the remaining blower continues to cool the BladeCenter unit and blade
servers.
Important: Replace a failed blower as soon as possible, to restore cooling
redundancy.
36
BladeCenter E Type 8677 and 1881: Hardware Maintenance Manual and Troubleshooting Guide