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Sc847 36 drive config. Wd RE3 1tb drives. Areca and lsi hba. 3 or so drives would completely hang under any kind of decent load. Replaced with lsi 1068 and chenbro sas espanders and replaced the supermicro backplane with the -A version (direct port) and its been riPping along for well over a year. We replaced the 3gb backplane 2x and exact same failures. Supermicro refuses to concede a problem exists. The smicro board is total sh*t despite using an lsi expander chip....