two ata write chaching request

[Chuck Swiger]

On Dec 20, 2010, at 3:10 PM, Alexander Best wrote:
> 1) write caching to be turned on and off for individual hdds
>   (i.e. hw.ata.X.wc) and
> 2) to be able to turn write chaching on and off on the fly.

NetBSD's dkctl allows one to enable and disable read or write caches on a per-device basis, on the fly.  Presumably atacontrol or whatever the new ada / ACHI driver uses for control would be the FreeBSD equivalent....

Regards,
-- 
-Chuck