From owner-freebsd-hardware Wed Jun 28 12:10:33 2000 Delivered-To: freebsd-hardware@freebsd.org Received: from mx1.hcvlny.cv.net (mx1.hcvlny.cv.net [167.206.112.76]) by hub.freebsd.org (Postfix) with ESMTP id 644EE37B602 for ; Wed, 28 Jun 2000 12:10:29 -0700 (PDT) (envelope-from steinyv@skyweb.net) Received: from s1.optonline.net (s1.optonline.net [167.206.112.6]) by mx1.hcvlny.cv.net (8.9.3/8.9.3) with ESMTP id PAA18616 for ; Wed, 28 Jun 2000 15:10:28 -0400 (EDT) Received: from downstairs (d133-103.jcsnnj.optonline.net [24.189.133.103]) by s1.optonline.net (8.9.1/8.9.3) with ESMTP id PAA26912 for ; Wed, 28 Jun 2000 15:10:25 -0400 (EDT) Message-Id: <4.2.0.58.20000628145800.009e8b80@> X-Sender: steinyv@pluto.skyweb.net X-Mailer: QUALCOMM Windows Eudora Pro Version 4.2.0.58 Date: Wed, 28 Jun 2000 14:59:11 -0400 To: freebsd-hardware@freebsd.org From: steinyv Subject: Re: SCSI In-Reply-To: References: <4.2.0.58.20000628124941.009ad100@> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org I have some regular scsi hard drives and cdrom, could I use these with a differential controller?? Thanks for your input At 01:12 PM 6/28/00 , you wrote: >It's a signal level issue, not a performance issue. Rather than TTL -5v to 0v >at 40ma, it's +5/-5 (IIRC) with micro-electric chair amperage. > >The only practical effect of using differential is you can run a *much* longer >cable. > >Do *not* mix non-differential or differential devices. Devices have gotten >more resilient, but you could certainly fry things that way. > >Note that LVD (low voltage differential) is a different thing entirely. >I won't go into that- check any one of the HBA or Drive vendor's websites- >you'll find overviews of that there (or see http://www.ultra160-scsi.com >for Ultra3). > >On Wed, 28 Jun 2000, steinyv wrote: > > > Please excuse me, but does a differential scsi card differ from a regular > > one, in what way? Could I use them with FBSD? What should I look out for? > > Thank You gurus > > :) > > > > _________________________________________ > > Steiny's Studio > > Pachyderm Productions > > http://steiny.hypermart.net > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-hardware" in the body of the message > > _________________________________________ Steiny's Studio Pachyderm Productions http://steiny.hypermart.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message