Removing And Installing Power Modules - IBM eServer BladeCenter T8720 Installation And User Manual

Removing and installing power modules

The BladeCenter T unit is separated into two power domains. To support devices in
power domain B, a power-supply module option (consisting of two power modules)
must be installed.
The following table summarizes the modules that are powered by each power
domain.
All flour blowers are required for redundant system operation. Power for all four
blowers is shared by all installed power modules. One failed blower creates a
nonredundant configuration.
If a power module fails or an input power failure occurs, BladeCenter T units that
are configured for redundant power operation will operate in a nonredundant mode.
You must replace the failing power module or restore input power as soon as
possible to regain redundant power operation.
Important:
1. The power modules must be installed in pairs in a domain and must match each
2. To provide true redundant power, BladeCenter T power modules 1 and 3 must
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BladeCenter T Types 8720 and 8730: Installation and User's Guide
Power domain Power-module bays
A
B
other in capacity (wattage, amperage, and so on).
be connected to a different input power source than power modules 2 and 4.
Modules powered by the power domain
1 and 2 I/O-module bays 1 and 2
Management-module bays 1 and 2
Media tray
Blade bays 1 through 4
3 and 4 Blade bays 5 through 8
I/O-module bays 3 and 4