Just as a preface, I’ve already re-assembled the drives and returned them successfully but am asking for future knowledge.
Anyways, I have 2 6x4TB zpools on my TrueNAS box and 3 drives were showing pre-fail in smartctl. I had one spare 4TB drive and bought 2x8TB WD Elements drives. I shucked the drives and found 2x WD80EDAZ-11TA3A0. I tested them before shucking them and they worked fine and passed the long smartctl tests. I formatted them and installed them in my NAS and I couldn’t get either to post no matter what I tried. From everything I read these do not require a 3.3v mod. I tried other drives on the same cables I used for them and ruled out power/data connection issues. I tried formatting them as ext4 and swapping them from GPT to MBR with no luck. Even after shucking them I plugged them into an external docking station I have and the power on and showed up fine on my PC. So… long way of asking, does anyone have experience with these drives in TrueNAS/FreeBSD with a SAS2008 expander?