AMCC 9550SX-8LP manual Installing the Battery Backup Unit

Chapter 2. Installing the Battery Backup Unit

The Battery Backup Unit (BBU) is an add-on that can be attached to a 3ware 9550SX RAID controller to supply power to the memory module from an attached battery pack in the event of a system power loss. This allows the controller to use write-caching for optimal performance and not be exposed to data loss in the event of a system power failure. When fully charged, the battery preserves the contents of the controller cache memory for a limited period of time (up to 72 hours). When power is restored, cached data is flushed to disks.

Caution: Both the 3ware RAID controller and the BBU are sensitive electronic equipment and can be damaged through electrostatic discharge. When installing the BBU on the controller, be sure you are grounded. Use a grounding strap, or work on an ESD-protective mat.

„Do not remove the 3ware controller or BBU from their protective bags until you are properly grounded.

„Handle the 3ware RAID controller by its edges or by the metal bracket at its end.

„Do not touch any pin, contact, lead, or component on the 3ware RAID controller.

Important: The battery is a heat-sensitive component. The cooler the battery, the longer the battery lasts. If possible, place the controller with the BBU in a slot with good airflow, away from components that generate the most heat in the system, such as video cards.

Note: The battery will drain if it is plugged into the BBU and there is no power to the unit. Wait to plug the battery into the BBU until the system is ready for use.

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