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Intel may make changes to specifications and product descriptions at any time, without notice. Intel is a registered trademark of Intel Corporation or its subsidiaries in the United States and other countries. * Other names and brands may be claimed as the property of others. Copyright © 2008 Intel Corporation. All Rights Reserved. Copyright © 2008 by LSI Logic Corporation. All rights reserved Contents List of Figures..................................................................................................... iv List of Tables ...................................................................................................... iv About the Intel® RAID Smart Battery...................................................................i Installing the AXXRSBBU6................................................................................. 3 Important Pre-installation Considerations ......................................................................4 Step-by-step AXXRSBBU6 Installation..........................................................................4 Monitoring Battery Backup ................................................................................ 7 Monitoring BBUs with the RAID BIOS Configuration Utility............................................7 Using Intel® RAID Web Console 2 .................................................................................8 Replacing Battery Backup Units........................................................................ 9 Disposing of Battery Backup Units.................................................................................9 Battery Backup Unit Specifications................................................................. 10 Battery Life and Data Retention Time..........................................................................10 List of Figures Figure 1. Top and Bottom View of the AXXRSBBU6...................................................................3 Figure 2. Battery alignment on the add-in Intel® RAID Controllers ..............................................5 Figure 3. Battery board mounting on RAID controller board........................................................5 Figure 4. Reinserting an add-in RAID Controller .........................................................................6 Figure 5. Battery monitoring with the RAID BIOS Utility ..............................................................7 Figure 6. BBU information in RWC2 ............................................................................................8 List of Tables Table 1. Battery Backup Unit Specifications..............................................................................10 About the Intel® RAID Smart Battery Intel® RAID Controllers and Intel® Integrated Server RAID Modules provide reliability, high performance, and fault-tolerant disk subsystem management. A complete fault-tolerant strategy requires protection for all data, including the unwritten cached data in the RAM cache. If power is lost, the data in RAM is lost. To avoid this data loss, a battery can be added to supply power to the RAID RAM during an AC power outage or if the AC power cord is removed. A battery backup unit protects the integrity of the cached data on Intel RAID controllers by providing backup power if there is a complete AC power failure or a brief power outage. The Intel RSBBUs provide an inexpensive alternative to using an uninterruptible power supply (UPS) or act as a second level of fault tolerance when used in conjunction with a UPS. The cache memory available on Intel controllers can improve overall system performance. Writing data to the controller’s cache memory is much faster than writing it to a storage device. Write operations appear to complete very quickly at the software application level. The Intel RAID controller then writes the cached data to the storage device when system activity is low or when the cache is getting full. The risk of using write-back cache is that the cached data can be lost if the AC power fails before it has been written to the storage device. This risk factor is eliminated when the Intel RAID controller has an onboard BBU. The Intel RSBBUs monitor the voltage level of the DRAM modules installed on the Intel RAID controller. If the voltage drops below a predefined level, the battery backup module switches the memory power source from the Intel RAID controller to the battery pack attached to the Intel RAID Smart Battery Backup Unit (RSBBU). As long as the voltage level stays below the predefined value, the Intel RSBBU provides power for memory. If the voltage level returns to an acceptable level, the RSBBU switches the power source back to the Intel RAID controller, and all pending writes to storage devices are completed with no data loss. A smart battery backup unit (BBU) has built-in functionality to charge the battery pack automatically and to communicate battery status information such as voltage, t...