The controller or battery may need to be replaced if the battery re-learn process does not revive the battery. The battery or the RAID controller will need to be replaced. Opening the chassis and finding the correct controller may be difficult to do.
An example battery failure message would look like:
Message: Adapter 2; seqNum: 0x01722f4d; Time: Wed Jun 15 01:32:25 2022; Event Description: Battery has failed and cannot support data retention. Please replace the battery;
Note: "Serial" is the management MAC address and not the serial number of the appliance
Symantec S500 hardware
The battery has died and cannot be revived.
Below is a diagram of the layout of the RAID controllers, ethernet ports, and power supplies.