From owner-freebsd-hackers Mon Feb 14 16: 7:35 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from mail.rz.fh-wilhelmshaven.de (mail.rz.fh-wilhelmshaven.de [139.13.25.134]) by builder.freebsd.org (Postfix) with ESMTP id 76A0F4B2D for ; Mon, 14 Feb 2000 16:02:44 -0800 (PST) Received: from fettesau.stuwo.fh-wilhelmshaven.de (stuwopc5.stuwo.fh-wilhelmshaven.de [139.13.209.5]) by mail.rz.fh-wilhelmshaven.de (8.9.3/8.9.3) with SMTP id BAA09842; Tue, 15 Feb 2000 01:02:55 +0100 (MET) Message-Id: <4.1.20000215005607.00c043c0@mail.rz.fh-wilhelmshaven.de> X-Sender: ohoyer@mail.rz.fh-wilhelmshaven.de X-Mailer: QUALCOMM Windows Eudora Pro Version 4.1 Date: Tue, 15 Feb 2000 01:03:40 +0100 To: ozden@research.bell-labs.com (Banu Ozden) From: Olaf Hoyer Subject: Re: scsi target mode Cc: freebsd-hackers@freebsd.org In-Reply-To: <200002141719.MAA18497@aura.research.bell-labs.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG >a. settings on the controller card (e.g. scsi id, termination) >b. freebsd configuration on the initiator and target PCs. > (e.g. do we use scsi_pt.c, scsi_target.c, etc). > >here's a diagram depicting what we want to do. we're trying to setup >a PC (PC2 below) with an adaptec controller to act as an emulated disk. >PC 1 will access the disks on PC 2. > > ______________ ______________________________ >| PC1 | scsi cable | PC2 scsi bus | >| adaptec 2940 | ================= | adaptec 2940 ======== disk | >| SCSI ID=7 | | SCSI ID=0 SCSI ID=5 | >|______________| |______________________________| > Hi! Well, I'd rather try (for simplification) following combo: I won't connect the two 2940 directly. PC1 goes via the external SCSI-connector to another (50-pin narrow connector), that is directly hooked up to the cabling between the HDD and the 2nd AHA 2940 in PC2. AHA 2940(id5)--------------^^^----------HDD Slot blind with adapter | | to 2940(id7) Those adapters are quite cheap (50 pin from ribbon cable to 50 pin slot blind) In that combo you would bypass the AHA2940 having to act as a "router" with his two SCSI channels, being the external connector one channel. You only would have to worry about right bus negotiation and termination. (Ok, if you want to do this for fun--- nuff said) Regards Olaf Hoyer -------- Olaf Hoyer www.nightfire.de mailto:Olaf.Hoyer@nightfire.de FreeBSD- Turning PC's into workstations ICQ:22838075 Liebe und Hass sind nicht blind, aber geblendet vom Feuer, dass sie selber mit sich tragen. (Nietzsche) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message