On Tue, 21 Aug, 2007 at 08:00:00PM +0200, it was scribed by bouyer@antioche.eu.org that:
> On Tue, Aug 21, 2007 at 07:57:42PM +0200, Quentin Garnier wrote:
> > 
> > Yep, that's definitely the reason why you experience slow writes.  That
> > said, I don't know how to enable it.  Apparently atactl(8) doesn't offer
> > a command.  Odd, but Manuel Bouyer will probably have an answer for that
> > in a short while.
> 
> Yes, see dkctl(8) :)

heehee, that was really great!
That did the trick!
it reported with getcache:

# dkctl wd1 getcache
/dev/rwd1d: read cache enabled
/dev/rwd1d: write-back cache enabled
/dev/rwd1d: read cache enable is not changeable
/dev/rwd1d: write cache enable is changeable
/dev/rwd1d: cache parameters are not savable

but, I set the write cache to enable, and rebooted, and it stuck, so
should be good to go!
Thank you so much!
Jonathan