Following error is logged in event viewer on windows server running on HP server having Smarty Array 6i RAID controller.
"1794-Drive Array - Array Accelerator Battery Charge Low... ...Array Accelerator is temporarily disabled. Array Accelerator will be re-enabled when battery reaches full charge. Audible Beeps: None Possible Cause: The battery charge is below 75 percent. Posted writes are disabled. Action: Replace the array accelerator board if the batteries do not recharge within 36 powered-on hours."
The function of this battery is to provide supply to "write cache" on controller card and is used in case when power supply abruptly fails and it retains the pending writes in "write cache". The same data is written back to RAID array when power comes back.
As suggested by HP I upgraded RAID firmware & the error message is gone. Further if still remains then there could be genuiene fault with battery one needs to replace battery on controller.
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