Here are general instructions:

1. Shutdown the SnapStream server
2. Slide the SnapStream out of the rack without unracking it. Please be sure to keep all cabling in place as you slide the SnapStream forward as the cabling must remain the same in order for the SnapStream to function. If you need to loosen or unplug any cabling, be sure to label it as it is very important to preserve the wiring configuration.
3. At the top of the case there are two access panel retainer buttons, push those down and slide the top cover from front to back. Once it stops moving backward you can lift the top cover and set it aside. **Note: If the cover does not slide freely, there may be screws on either side of the case, remove those and the cover should slide freely.**
4. Find the RAID card, this is often the 5th card from the left and has a faceplate that differs from all the other slots.  Once located, unplug the Serial Attached SCSI (SAS) cable and remove the card from the chassis.  You will need to remove one #2 sized Phillips head screw that is holding it in place. The card should come straight out of the slot.
5. The BBU is mounted on the card with 3 screws holding it in place. Remove these three screws to release the battery and Printed Circuit Board (PCB). Swap the BBU with the new unit and replace the screws.  Then, install the card back into the SnapStream.
6. Assembly is the reverse of disassembly. Once you have this done, please power up the SnapStream, log in and give us a call at 1-877-696-3674 so that we can establish a remote connection to verify that everything is operational.

NOTE: The BBU replacement should be performed when there is a lull in your recording schedule.

Here's a PDF that will also detail the steps to replace the BBU:

http://download.snapstream.com.s3.amazonaws.com/support/Documentation/MR_iBBU07_QIG.pdf