From owner-freebsd-scsi Thu Sep 16 10: 7:50 1999 Delivered-To: freebsd-scsi@freebsd.org Received: from feral.com (feral.com [192.67.166.1]) by hub.freebsd.org (Postfix) with ESMTP id 7DA331561E for ; Thu, 16 Sep 1999 10:06:58 -0700 (PDT) (envelope-from mjacob@feral.com) Received: from semuta.feral.com (semuta [192.67.166.70]) by feral.com (8.8.7/8.8.7) with ESMTP id KAA22050; Thu, 16 Sep 1999 10:05:07 -0700 Date: Thu, 16 Sep 1999 10:06:42 -0700 (PDT) From: Matthew Jacob Reply-To: mjacob@feral.com To: brad@baileylink.net Cc: freebsd-scsi@FreeBSD.ORG Subject: RE: tandberg ns8 with on-board adaptec AIC-7890 In-Reply-To: <000201bf005c$43cf17e0$33d5473f@togo.javabit.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Thu, 16 Sep 1999 brad@baileylink.net wrote: > Probably not. If I read correctly you use one SCSI bus. Every SCSI bus > should have 2 terminators, one on each end. I believe that the motherboard > controller will terminate one end automatically. It is advisable to either Usually it's an option to set in the BIOS. > terminate the last device and place it at the end of the cable or to use and > external (preferably active) terminator. > > On a side note, I have heard that one would only need one terminator for > busses with cable length of less than 18 inches, personally I always use > two. (stubs) Nope. About 2 inches, but not at ultra speeds. > > BMG > > p.s. Please go easy on me if this is not exactly correct, SCSI busses have > changed a lot over the years. Not really. They're pretty much the same as they've been all along. Some extra lines and some higher speeds, but the basics have been the same. What *has* changed is the ability of cable manufactures to get clean enough cables to make things like SYNC mode (at 5Mhz through 40Mhz) work pretty reliably. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message