Self-encrypting hard drives

[Guy Helmer]

I'm looking into using self-encrypting hard drives (TCG Opal standard) with
FreeBSD.  In particular I want to use the auto-lock mode.  I can't seem to
find the details regarding how the authentication key is provided to the
drive, and where there is any support in FreeBSD to enable unlocking the
drive for use.  Any pointers would be appreciated.

Thanks,
Guy