Mylex eXtremeRAID Installationsanleitung PDF herunterladen (Seite 35)

775013 A-1

Appendix A

Memory Module and

Battery Backup Unit

Figure A-1. DMM1100

Product Description

The Synchronous Dynamic Memory Module and Battery Backup Unit

(DMM1100) is a cache memory module that maintains data integrity in the

event of a power failure. The battery backup portion of this module monitors

the write back cache on the DAC1164P 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 DMM1100 installed, together occupy only one PCI

slot on the host backplane.

Features

Some of the features of the DMM1100 include:

• Gas gauge circuit for battery charge monitoring

• Quick charge to replenish a drained battery

• SDRAM on the DMM1100 module

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Mylex eXtremeRAID Installationsanleitung Seite 35