Mylex eXtremeRAID 1100, Руководство по установке

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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