FWIW, i have a thread with 8TB HGST SUN/ORACLE sas hdds, which came with 520b sectors- and me (and w help from others on this fourm) tried EVERYTHING to get them to switch to 512b , to no avial.
They have been running great on my freenas/zfs setup, but i do loose ~150gb due to the 520b , and it means i cant use them as hotswap on my various real (512b) 8tb disk pools (a bit of an issue).
I have no experience with these specific 1.6t hgst ssds, but its worth noting that there are examples where you are stuck with 520b. (not a huge deal, but do be aware).