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This quick installation guide explains how to install the 
LSIiTBBU03 Intelligent Transportable BBU on the MegaRAID 
SAS 8888ELP RAID controller.

The iTBBU03 is an intelligent, transportable battery backup 
unit that protects the integrity of the cached data on the 
MegaRAID controller for up to 72 hours in the event of a 
complete AC power failure or a brief power outage. The 
iTBBU03 connects directly to the SAS 8888ELP RAID 
controller in the MiniDIMM socket. 

LSI Logic provides a family of MegaRAID intelligent 
transportable battery backup units (iTBBUs) for use with its 
high-performance MegaRAID RAID controllers. The 
MegaRAID iTBBUs provide an inexpensive alternative to 
using an uninterruptible power supply (UPS) and a second 
level of fault tolerance when used in conjunction with a UPS.

Note:

See the 

MegaRAID 1078 Battery Backup Unit 

User’s Guide

 for detailed information about this 

battery.

Figure 1

 shows the top view and the bottom view of the 

iTBBU03. (The “top” side is the side you can see after you 
install the iTBBU03 on the motherboard or server chassis.) 

Figure 1 LSIiTBBU03 Intelligent Battery Backup 

Unit

Note:

The only functional difference between the iBBU 
and the iTBBU is that the battery unit is 
integrated into the cache DIMM itself on the 
iTBBU. This integration enables you to transfer 
the DIMM assembly from a faulty RAID controller 
to a new RAID controller and to fully recover 
unwritten cache data.

I n s t a l l i n g   t h e   i T B B U 0 3   o n   t h e   S A S  
8 8 8 8 E L P   R A I D   C o n t r o l l e r

Follow these steps to install the iTBBU03 on the MegaRAID 
SAS 8888ELP RAID controller. The battery is installed on 
the top of the controller.

Step 1

Ground yourself, and remove the iTBBU03 and 
the daughtercard from the package.

Step 2

Insert the J1 battery pack harness connector at 
the end of the colored wires into the 5-pin 
connector in the opening in the corner of the 
iTBBU03.

Step 3

With the front side up, place the iTBBU03 front-
side-up on a flat, clean, static-free surface.

Step 4

With the front side up, place the MegaRAID SAS 
8888ELP RAID controller on a flat, clean, static-
free surface.

Step 5

Mount the iTBBU03 in the MiniDIMM memory 
socket on the RAID controller as you would a 
standard DIMM, as shown in 

Figure 2

.

Electrostatic discharge can damage the iTBBU03 
and the MegaRAID SAS RAID controller. Make 
sure that you install the iTBBU03 at an ESD-safe 
workstation that meets the requirements of EIA-
625 – “Requirements For Handling Electrostatic 
Discharge Sensitive Devices.” When you install 
the iTBBU03, follow the ESD-recommended 
practices in the latest revision of IPC-A-610.

The  iTBBU03 and the integrated charging 
circuitry were specifically designed for Li-Ion 
Polymer battery cells. Attempts to self service or 
replace any original component could result in an 
explosion or a fire. Please dispose of used 
batteries in accordance with local laws.

!

CAUTION

WARNING

!

MegaRAID

®

 iTBBU03 Battery Backup 

Unit

Quick Installation Guide

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