Subject: Re: scsi DLT tape drives
To: Andy Ruhl <>
From: Manuel Bouyer <>
List: port-i386
Date: 07/07/2004 20:55:17
On Wed, Jul 07, 2004 at 09:51:58AM -0700, Andy Ruhl wrote:
> It's generally not a good idea to use devices of widely varying speed
> on the same bus, especially if those devices are expected to talk
> directly to each other. As for the exact technical reason? I'll have
> to pull out the manuals and look it up... But I'm sure I'm about to
> get the answer from you anyway, either supporting or not supporting
> this.

If he's mixing devices using different signals (single-end vs LVD),
the speed of the whole bus will be limited by the older signal type.
In this case, the adapter, and the U320 drives will all run at 40MB/s

Manuel Bouyer <>
     NetBSD: 26 ans d'experience feront toujours la difference