From owner-freebsd-hackers  Sat Jun 21 17:07:40 1997
Return-Path: <owner-hackers>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.5/8.8.5) id RAA27324
          for hackers-outgoing; Sat, 21 Jun 1997 17:07:40 -0700 (PDT)
Received: from sendero-ppp.i-connect.net (sendero-ppp.i-Connect.Net [206.190.143.100])
          by hub.freebsd.org (8.8.5/8.8.5) with SMTP id RAA27289
          for <hackers@FreeBSD.ORG>; Sat, 21 Jun 1997 17:07:28 -0700 (PDT)
Received: (qmail 2241 invoked by uid 1000); 22 Jun 1997 00:07:34 -0000
Message-ID: <XFMail.970621170734.Shimon@i-Connect.Net>
X-Mailer: XFMail 1.2-alpha [p0] on FreeBSD
Content-Type: text/plain; charset=iso-8859-8
Content-Transfer-Encoding: 8bit
MIME-Version: 1.0
In-Reply-To: <199706211509.RAA00356@yedi.iaf.nl>
Date: Sat, 21 Jun 1997 17:07:34 -0700 (PDT)
Organization: Atlas Telecom
From: Simon Shapiro <Shimon@i-Connect.Net>
To: Wilko Bulte <wilko@yedi.iaf.nl>
Subject: Re: Announcement: New DPT RAID Controller Driver Available
Cc: hackers@FreeBSD.ORG, gjennejohn@frt.dec.com
Sender: owner-hackers@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk


Hi Wilko Bulte;  On 21-Jun-97 you wrote: 

...

> > an earlier poster that those flimsy flex connections are pretty cheesy
> > and *so* easy to ruin).
> 
> You are not supposed to get your hands on them... Newer SBBs have
> 'warranty void' stickers on them to keep people from opening them.
> 
> If you want a really fragile flex check out a TZ8[67] DLT tape drive
> in an SBB. But kidding aside: you need to be careful with the flexes,
> but apart from that it works just fine.

The flex circuit has a reason (other than being the ``cool'' thing to do);
they eliminate connectors (improves signal quality), and allow impedience
matching.  The worst enemy of a SCSI bus is the impedience changes between
traces, connectors, external cables, connectors, ribbon cables, backplanes,
stub riboon cables, etc. etc.

Simon