IBM 8265 Nways ATM Switch, Руководство пользователя

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Changing the Power Mode
The 8265 uses load-sharing power supplies that support two power modes.
Ÿ Power fault-tolerant mode - this mode can be established only if there is at least one power supply's
worth of power more than what is needed to meet the current power requirements of all installed
modules.
When the 8265 is running in power fault-tolerant mode, one power supply's worth of power is always
kept in reserve. If a power supply fails, reserve power becomes available and the 8265 continues to
operate.
Ÿ Power non-fault-tolerant mode - when in this mode, the full power output of all installed power supplies
is available to run the 8265 and installed modules.
Note: 8265 modules are automatically power-managed by the controller module.
Use the SET POWER MODE to choose between normal and fault-tolerant power supply operation using
the 8265 intelligent power management system.
For example:
Ÿ Each power supply (415 Watt power supply) provides approximately 300 Watts at +5 Volts
Ÿ You have three power supplies available (which gives you 900 Watts of +5 Volts)
In this example, non-fault tolerant mode allows you to use 900 Watts. Fault-tolerant mode allows you to
use 600 Watts, reserving 300 Watts to use in the event of a power supply failure.
Note: Regardless of the power mode setting, the power load being used is shared across all installed
power supplies.
To set the power mode to fault-tolerant mode or power non-fault-tolerant mode, use the following
command syntax:
SET POWER MODE {fault_tolerant}
SET POWER MODE {non_fault_tolerant}
In the following example, the power mode is set to power fault-tolerant mode:
à ð
8265ATM
>
set power mode fault_tolerant
Power mode set to FAULT_TOLERANT
8265ATM>
á ñ
Note: Fault-Tolerant Mode indicates the power mode you set. Fault-Tolerant Status indicates the mode
currently in effect. A power supply failure, or the installation of an additional power supply
exemplify conditions that may cause the Fault-Tolerant Status to change to the power mode you
previously set.
Chapter 9. Managing the Power Subsystem
107