On Wed, Dec 18, 2002 at 09:37:52AM +0200, Jukka Marin wrote:
> But with the large RAM caches on the disk (like 8 MB in my case), can't
> the disk still do the actual (write) operations in an optimized order?

Yes, write. But not reads.

> Well, 8 MB may not be as good as a long command queue..

Probably not. A decent SCSI drive with a good SCSI controller can accept
commands for more data than its cache can hold, and request the data
later when there is enouth place in cache, wihtout host CPU interventions.

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 23 ans d'experience feront toujours la difference
--