From owner-freebsd-hackers Fri Mar 22 14:58:21 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id OAA08646 for hackers-outgoing; Fri, 22 Mar 1996 14:58:21 -0800 (PST) Received: from ns.ge.com (ns.ge.com [192.35.39.24]) by freefall.freebsd.org (8.7.3/8.7.3) with ESMTP id OAA08638 for ; Fri, 22 Mar 1996 14:58:16 -0800 (PST) Received: from crissy.gemis.ge.com ([3.29.7.57]) by ns.ge.com (8.7.5/8.7.3) with SMTP id RAA21732; Fri, 22 Mar 1996 17:58:12 -0500 Received: from salem.ge.com (carsdb.salem.ge.com [3.29.7.15]) by crissy.gemis.ge.com (8.6.11/8.6.11) with SMTP id RAA19182; Fri, 22 Mar 1996 17:58:08 -0500 Received: from combs.salem.ge.com by salem.ge.com (4.1/SMI-4.1) id AA05330; Fri, 22 Mar 96 17:58:08 EST Received: from localhost (steve@localhost) by combs.salem.ge.com (8.7.5/8.6.11) with SMTP id RAA07563; Fri, 22 Mar 1996 17:58:07 -0500 (EST) Date: Fri, 22 Mar 1996 17:58:06 -0500 (EST) From: "Stephen F. Combs" Reply-To: CombsSF@salem.ge.com To: Nate Williams Cc: Terry Lambert , hackers@freebsd.org Subject: Re: Crash advice needed (long) APPENDIX A In-Reply-To: <199603222151.OAA20160@rocky.sri.MT.net> Message-Id: Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Sorry Guys, I started with a 1542A (circa 1989) with internal AND external devices. I'm useing a CF now, but I've used 1542A's, 1542B's, AND 1542CF's. ---- Stephen F. Combs Internet: CombsSF@Salem.GE.COM GE DS&TC Voice: 540.387.8828 Network Services Home: CombsSF-Home@Salem.GE.COM 1501 Roanoke Blvd FAX: 540.387.7106 Salem, VA 24153 On Fri, 22 Mar 1996, Nate Williams wrote: > Date: Fri, 22 Mar 1996 14:51:02 -0700 > From: Nate Williams > To: Terry Lambert > Cc: hackers@freebsd.org > Subject: Re: Crash advice needed (long) APPENDIX A > > > > Apart from the fact that 20' is too long (3m max for fast-SCSI, 1542C is > > > a Fast capable controller that will try to use 10Mbytes/sec with a Fast > > > device) Adaptecs tend to work better if the controller is at the end of > > > the SCSI bus. So, either use the internal or external connector but not > > > both at the same time > > > > Using both busses is not a problem for the CF; the C and prior can > > only successfully use the internal or the external unless there is > > a modification (invloving a capacitor and a resistor soldered on near > > the external connector). > > Bzzt. Thanks for playing, but no dice. I've run my 1542B (which was > *very* much prior to the C model) with internal/external devices since a > month after I got it. I updated to the most recent BIOS revsion before > I did that, but I've had no problems that have been due to my board. > It's worked flawlessly running SCSI-I and SCSI-II disks, tapes, and CD's > externally. (Though I haven't yet stuck a scanner on it. That'll be > the next project. :) > > Termination seems to be less critical on older SCSI devices, as I ran > with the adapter terminated, external devices, and with both my internal > drives terminated until I got my new disk a year and a half ago. Now I > have to run everything properly terminated, and have added an external > 4MM DAT w/out problems. > > I'm running a mixture of SCSI-I and SCSI-II peripherals if that makes > any difference. > > Termination <-> External S2-DAT <-> 1542B <-> Quantum 1.8G S2 \ > <-> Quantum 40MB S1 <-> Tanberg 150 S1/S2(?) <-> NEC 3X CD <-> > Termination > > My Tandberg claims to be a SCSI-II device, but I don't think it is. > > > > Nate >