How do I spinup disk from power-up in standby ?

[Dieter]

Western Digital SATA disk in "power-up in standby" mode.
disk is connected to nforce4-ultra
FreeBSD 7.0  amd64

Google found that MirBSD's atactl man page has:

puisspinup      Explicitly spins up the device if power-up in standby (puis)
                mode is enabled.

I can't find anything like this on FreeBSD.  (I checked 7.1 also)
And the disk doesn't show up in dmesg.  It should be ad6,
but there is no ad6 and no Western Digital or WD in dmesg.