HP A3550A - High Availability Disk Arrays Model 20 Storage Enclosure Installation Manual

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Hewlett-Packard Battery Backup Unit (BBU)Installation Guide (10 and 30-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 10-slot and 30-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.On 30-slot disk arrays, ground the ESD wrist strap tothe metal edge above the rear retaining screws.On 10-slot disk arrays, ground the ESD wrist strap tothe metal edge around the disk modules.Step 2: Prepare to install the BBUo Remove the new BBU from its shipping carton andplace it on a suitable antistatic surface or the ESD con-ductive sheet.o If installing a BBU in a 10-slot disk array, remove thefront bezel by pulling it off on one side and then theother.o If installing a BBU in a 30-slot disk array, open the fanpack by pressing the release button and carefully swing-ing the fan pack open.The BBU can be installed or replaced with array power on.For the 30-slot array, the installation or replacement MUSTbe completed and the fan pack closed within two minutes toavoid a thermal shutdown.Batterybackup unit(BBU)disk-drivemodulesFront view of 10-slotdeskside disk array(front bezel removed for clarity)Batterybackup unit(BBU)Front view of 10-slotrackmount disk array(front bezel removed for clarity)SP-A SP-BBBURear view, top of a 30-slot disk array, rackmount only(fan pack not shown for clarity)

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