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
Chapter 1 Installing the Battery Pack | 1 |