From owner-freebsd-questions Tue May 25 15:55:52 1999 Delivered-To: freebsd-questions@freebsd.org Received: from uni4nn.gn.iaf.nl (osmium.gn.iaf.nl [193.67.144.12]) by hub.freebsd.org (Postfix) with ESMTP id 47E2A1598C; Tue, 25 May 1999 15:55:47 -0700 (PDT) (envelope-from wilko@yedi.iaf.nl) Received: from yedi.iaf.nl (uucp@localhost) by uni4nn.gn.iaf.nl (8.9.2/8.9.2) with UUCP id AAA06455; Wed, 26 May 1999 00:13:19 +0200 (MET DST) Received: (from wilko@localhost) by yedi.iaf.nl (8.9.3/8.9.3) id XAA05463; Tue, 25 May 1999 23:49:16 +0200 (CEST) (envelope-from wilko) From: Wilko Bulte Message-Id: <199905252149.XAA05463@yedi.iaf.nl> Subject: Re: Help! - "parity error during data-in phase" when using CD-Rdrv In-Reply-To: <374AF6E8.9CD7300C@3-cities.com> from Kent Stewart at "May 25, 1999 12:15:52 pm" To: kstewart@3-cities.com (Kent Stewart) Date: Tue, 25 May 1999 23:49:16 +0200 (CEST) Cc: dwhite@resnet.uoregon.edu, dburr@pobox.com, freebsd-questions@FreeBSD.ORG, freebsd-scsi@FreeBSD.ORG X-Organisation: Private FreeBSD site - Arnhem, The Netherlands X-pgp-info: PGP public key at 'finger wilko@freefall.freebsd.org' X-Mailer: ELM [version 2.4ME+ PL43 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG As Kent Stewart wrote ... > > I have also hooked a scsi cable incorrectly. Nothing on the scsi > controller worked when I did that. You can't hook a scsi cable up to a > CDROM off one pin like you can some devices. Nothing worked when you > do that either. It seems like you end up with a ground on a data line > or power. Correct observation. Single ended SCSI has a 1:1 interleave of the signal lines with ground lines (ok, there are a few exceptions, but this is the ground rule). This is yet another indication why 25pin subD-connectors are a horrible idea on a SCSI bus. | / o / / _ Arnhem, The Netherlands - Powered by FreeBSD - |/|/ / / /( (_) Bulte WWW : http://www.tcja.nl http://www.freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message