Hewlett-Packard Battery Backup Unit (BBU)Installation Guide (20-slot Disk Arrays)Hewlett-Packard BBUs are customer installable and replaceable. A replacement BBU must be the same type as the BBUbeing replaced.The locations of the BBUs in the 20-slot disk arrays are shown in Figure 1..Figure 1.Install or replace a BBU by performing the following steps. Place a check in the appropriate o as the step is completed.Step 1: Observe antistatic precautionsA BBU is shipped with an ESD kit containing:– ESD wrist strap– ESD conductive sheeto Ground the ESD wrist strap to any unplated metal onthe disk array chassis and fasten the strap to your wrist.Step 2: Prepare to install the BBUo Remove the new BBU from its shipping carton andplace it on a suitable antistatic surface or the ESDconductive sheet.o Open the fan pack by sliding the LOCK/UNLOCK switchto the UNLOCK position and carefully swinging the fanpack open.The BBU can be installed or replaced with array power on.The installation or replacement MUST be completed and thefan pack closed within two minutes to avoid a thermal shut-down.Step 3: Install the BBUo Locate the slot where the BBU is to be installed (Figure1) and remove the failed BBU or the BBU filler panel ifpresent (Figure 2). To remove the BBU, slide the blacklatches toward the center of the unit and extract theBBU.o Install the BBU as shown in Figure 2.o Push the BBU into the disk array chassis until thelatches on the BBU lock and audible clicks are heard.When the latches are locked, the BBU cannot be pulledout again without using the latches.BBU20-slot deskside and rackmount disk arrays (rear view)(shown with fan packs removed for clarity)All manuals and user guides at all-guides.comall-guides.com