D-Link DSN-4200 Hardware Reference Guide for DSN-4000 - Page 34

A.5 Replacing the Cache Battery Backup Module The DSN-4X00 primary array includes a Battery Backup Module located inside the Controller Module. The Battery Backup Module is used to protect the Cache Memory in case of an unexpected power failure. If the battery needs to be replaced, use the following procedure: Only replace the Battery Backup Module if you have been directed to do so by D-Link Technical Support. Installing the wrong replacement battery can result in an explosion. Dispose of failed batteries according to the instructions that come with the battery. 1. Perform an orderly shutdown of the DSN-4X00 storage array and remove the power cords from the rear panel. 2. Remove the Controller Module from the DSN-4X00 primary array chassis (refer to the previous section for detailed instructions). 3. Lay the RAID Controller on a non-static surface and remove the cover attaching screws, one on each side, then remove the cover. 4. Remove the battery assembly attaching screw on the outside of the RAID controller housing. 5. Detach the battery connector and remove the battery assembly. Figure A-4. Battery Backup Module 26 Appendix A Replacing and Upgrading FRUs