We have your chassis model below:
http://www.supermicro.com/products/chassis/3u/836/sc836s2-r800.cfm
which has BPN-SCA-836S2 backplane, we wonder if it’s possible to change backplane to 836 SAS backplane?
http://www.supermicro.com/products/chassis/3U/?chs=836
No, mechanically will not fit. These are different chassis revision designs.