Yes, an IDE bus will operate at the speed of the slowest device. This is
IDE specific, not NetBSD specific.

itai at replic d0t net

On Thu, 8 Aug 2002, Curt Sampson wrote:

> On Wed, 7 Aug 2002, Christoph Kaegi wrote:
>
> > Can the controller speak UDMA5 to the disk and, say, UDMA2 to the CD-ROM,
> > or will the whole channel be downgraded to UDMA2?
>
> I don't recall what the system said about what it was using, but I can
> say from experience that including a UDMA2 device on the same bus as a
> UDMA5 IBM IDE disk slowed down the IBM IDE disk, at least under NetBSD-current
> as of about four months ago.
>
> cjs
> --
> Curt Sampson  <cjs@cynic.net>   +81 90 7737 2974   http://www.netbsd.org
>     Don't you know, in this new Dark Age, we're all light.  --XTC
>
>