Avago Technologies Cache Protection for RAID Controller Cards - Manual (Page 11)

Avago Technologies
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Cache Backup Products for MegaRAID SAS+SATA RAID Controllers User Guide
May 2015 Chapter 2: Installing the Cache Backup Products
Installing the LSIiBBU01 Unit
Chapter 2: Installing the Cache Backup Products
This chapter explains how to install the BBU units that are used on MegaRAID SAS RAID controllers and how to
connect the CacheVault module to backup power units.
CAUTION Electrostatic discharge can damage the BBU units and the RAID
controllers on which they are installed. Always ground yourself, and
use a ground strap before touching the RAID controller or the BBU
unit. Perform all installation work at an ESD-safe workstation that
meets the requirements of Electronic Industries Alliance (EIA) EIA-625
(Requirements for Handling Electrostatic Discharge Sensitive Devices).
Follow the ESD-recommended practices in the latest revision of the
Inter-Process Communication (IPC®) IPC-A-610 (Acceptability of
Electronic Assemblies) standard.
If screws are required to attach the iBBU unit to the RAID controller, use an ESD-safe Phillips® screwdriver to install
them. Be sure the screwdriver is centered in the screw to avoid damaging the screw head. If you exceed the maximum
torque specification, you may damage the board, connectors, or screws, and you will void the warranty of the board.
The batteries in the iBBU units must recharge for at least six hours during fast charge under normal
operating conditions.
NOTE To protect your data, Avago recommends that you set the RAID
controller Write Policy to write-through until the battery unit is
charged. After the battery unit is charged, you can change the Write
Policy to write-back to take advantage of the performance
improvements of data caching.
The maximum operating temperature (ambient) for the battery packs is 40 °C. See Chapter 4 , Battery Backup Unit and
CacheVault Specifications , for the technical specifications for the iBBU units.
NOTE The temperature of the battery packs are generally 15 °C to 20 °C
higher than the ambient temperature during fast charge. Therefore, to
complete fast charge cycle, ambient temperature should be less than
40 °C. If the ambient temperature exceeds 40 °C, the fast charge cycle
terminates prematurely, which prevents the battery pack from
reaching a fully charged state.
2.1 Installing the LSIiBBU01 Unit
The two types of LSIiBBU01 units are:
 LSI intelligent Battery Backup Unit 01– NiMH (Nickel Metal Hydride)
 LSI intelligent Battery Backup Unit 01 – LiON (Lithium Ion)
WARNING The battery used in this device might present a fire or chemical burn
hazard if mistreated. Do not disassemble, heat above 100 °C, or
incinerate. Dispose of used battery correctly. Keep away from children.