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Manual No. 775051 A-1
Appendix A
BBM-Battery Backup Module
Figure A-1. BBM Module
Product Description
The Battery Backup Module (BBM) is a battery unit that maintains data
integrity in the event of a power failure. The battery backup on this module
monitors the write back cache on the AcceleRAID 352 controller, and
provides power to the cache if it contains data not yet written to the drives
when power is lost.
The controller, with the BBM installed, occupies only one PCI slot on the
host backplane.
Features
Some of the features of the BBM include:
• Gas gauge circuit for battery charge monitoring
• Quick charge to replenish a drained battery