Installation guide

Manual Number 775012 A-1

Appendix A

IBBU Option

Product Description

The Intelligent Battery Backup Unit (IBBU) option is an add-on module that

protects the data in the RAID controller’s cache memory in the event of a

power failure. This option is available only for full-length form factor

versions of the DAC960PG/PJ PCI to Ultra-SCSI RAID Controller.

The battery backup module monitors the write back cache on the

DAC960PG/PJ, and provides power to the cache if it contains data not yet

written to the drives when power is lost. The controller, with the IBBU

installed, together occupy only one PCI slot on the host backplane.

Features

Some of the new features of the IBBU include:

• Gas gauge circuit for battery charge monitoring

• Quick charge to replenish a drained battery

• Support for low-power EDO ECC RAM modules

Figure A-1. IBBU Components

Battery Pack

3.6v, 650mAH

Standoff