As an alternative have you tried the TCG Opal software vendors listed here: https://trustedcomputinggroup.org/wp-content/uploads/tcg_devicelist-20120108.pdf In Samsung Magician > Data Security > TCG Opal it says you need specific software to activate (as above). I installed SecureDoc standalone and it automatically enabled TCG Opal hardware encryption. Yes you need to buy the software but it's worth it. SecureDoc seems good value for money compared to other vendors and also it's easier to use. I have enabled TCG Opal hardware encryption on my Samsung 960 EVO.
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