Change in Write Policy Options After Updating Firmware

After updating firmware on one of the listed controllers, the Write Policy options will change from
Write Through
Write Back
Write Back with BBU
to
Write Through
Write Back
Always Write Back​

The functionality is defined as follows: Write Back means write back, only when there is a RAID maintenance free backup unit (RMFBU) installed.  Always Write Back means write back, regardless of the presence or absence of a RMFBU.