DATOptic ARC-1680 Series - Manual (Page 175)

175
APPENDIX
The batteries in the BBM are recharged continuously through a
trickle-charging process whenever the system power is on. The
batteries protect data in a failed server for up to three or four
days, depending on the size of the memory module. Under nor-
mal operating conditions, the batteries last for three years before
replacement is necessary.
•
Recovery ROM
The SAS RAID controller firmware is stored on the flash ROM and
is executed by the I/O processor. The firmware can also be up-
dated through the SAS RAID controllers PCIe bus port or Ether-
net port without the need to replace any hardware chips. During
the controller firmware upgrade flash process, it is possible for
a problem to occur resulting in corruption of the controller firm-
ware. With our Redundant Flash Image feature, the controller will
revert back to the last known version of firmware and continue
operating. This reduces the risk of system failure due to firmware
crash.