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Chapter 1 Installing the Battery Pack 1
1 Installing the Battery Pack
Overview
The PowerEdge Battery Backup Module protects the data handled
by the PowerEdge® Expandable RAID Controller by providing
protection from power supply interruptions to the PowerEdge
cache memory.
The PowerEdge Battery Backup Module monitors the voltage
level of the DRAM modules installed on the PowerEdge card and
supporting circuitry. If the voltage drops below a predefined level,
the Battery Backup Module switches the memory power source
from the PowerEdge card to the battery pack attached to the
PowerEdge Battery Backup Module.
As long as the voltage level is below the predefined value, the
PowerEdge Battery Backup Module provides the memory refresh
cycles necessary to retain the contents of the PowerEdge memory
modules.
If the voltage level returns to an acceptable level, the Battery
Backup Module switches the power source back to the
PowerEdge adapter card.
Cont’d