Areca 24/4 Internal/External Port Pcie 3.0 12 Gb/s SAS/SATA Raid Controller 2Gb Cache - Manual (Page 216)

APPENDIX
216
Appendix C
Battery Backup Module (ARC-6120BA-
T121-12G)
C-1 Overview
The 12Gb/s SAS RAID controller operates using cache memory. The
Battery Backup Module is an add-on module that provides power
to the 12Gb/s SAS RAID controller cache memory in the event of a
power failure. The Battery Backup Module monitors the write back
cache on the 12Gb/s SAS RAID controller, and provides power to
the cache memory if it contains data not yet written to the hard
drives when power failure occurs.
C-2 BBM Components
This section provides the board layout and connector/jumper for
the BBM.
C-3 Status of BBM
• D7 (Green) : light when BBM activated
• D8 (Green) : light when BBM normal
• D9 (Red) : light when BBM charging