Re: Removing softdep

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Wed, Jun 11, 2008 at 07:33:15PM -0700, Gary Thorpe wrote:
> > The paragraph above is basically wrong.  It is not the case
> > that if
> > a drive supports tagged command queueing, you can safely
> > allow it to
> > cache all writes.  Rather, you can disable the write cache
> > but get much
> > the same benefit from the write deferral performed by the
> > command queueing
> > mechanism.
> 
> If the write-cache is enabled, when will the drive send the completion: when 
> the data has been cached or when it is on the physical disk?

When it's cached: it's a write-back cache.

-- 
Manuel Bouyer, LIP6, Universite Paris VI.           
Manuel.Bouyer%lip6.fr@localhost
     NetBSD: 26 ans d'experience feront toujours la difference
--