I have 2 host servers running SVSAN & VMware 5.1, both have the same hardware and 2 controller cards. One (LSI MegaRAID SAS 9260-4i) mirrors a couple drives that run the OS and the other (LSI MegaRAID 9280-24i4e) is doing a RAID 5 for everything else keeping our data.
A few weeks ago the LSI 9280-24i4e had to be replaced as it was found to be defective. In order to troubleshoot it I updated the firmware. Moving all VM’s to the other host, then shutting down the host server, pulling the drives out and updating both controllers. All went well except that didn’t help the 9280 so I replaced it with the same model and current firmware. I installed the card, reseated the drives and booted, everything showed up and has been working fine. I discovered that the host servers 9280 cards did not have a battery backup so I ordered a couple (LSIiBBU08).
I have not worked with RAID cards very much and I know that one wrong move can cost you, so I am very paranoid about losing the configuration or any data. Can someone help me with steps in the correct order that I might take to install this battery and not lose anything?