Replacement for "hdparm -C"?

[Lupe Christoph]

I just received a PR for munin-node, complaining about error messages
related to the lack of a hdparm command on FreeBSD.

The munin-plugin hddtemp_smartctl tries to find out if a disk is spun
down by invoking hdparm -C $fulldev. The plugin will skip the invocation
of smartctl on such disks.

Since it is really a bad idea to spin up a disk to ask it for its
temperature - with what can I replace that command on FreeBSD?

Thanks for your help,
Lupe Christoph
-- 
| There is no substitute for bad design except worse design.                   |
| /me                                                                          |