From owner-freebsd-questions@FreeBSD.ORG Sun Dec 7 09:30:59 2003 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3ED4416A4CE for ; Sun, 7 Dec 2003 09:30:59 -0800 (PST) Received: from mta10.adelphia.net (mta10.adelphia.net [68.168.78.202]) by mx1.FreeBSD.org (Postfix) with ESMTP id 376C043FEC for ; Sun, 7 Dec 2003 09:30:58 -0800 (PST) (envelope-from lists@battleface.com) Received: from battleface.com ([24.52.31.3]) by mta10.adelphia.net (InterMail vM.5.01.06.05 201-253-122-130-105-20030824) with ESMTP id <20031207173101.LBPU25110.mta10.adelphia.net@battleface.com> for ; Sun, 7 Dec 2003 12:31:01 -0500 Date: Sun, 7 Dec 2003 12:30:56 -0500 Mime-Version: 1.0 (Apple Message framework v552) Content-Type: text/plain; charset=US-ASCII; format=flowed From: lists@battleface.com To: freebsd-questions@freebsd.org Content-Transfer-Encoding: 7bit Message-Id: <1D8F8708-28DB-11D8-83E3-000A95775140@battleface.com> X-Mailer: Apple Mail (2.552) Subject: SCSI--LVD vs SE... X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 07 Dec 2003 17:30:59 -0000 Am I understanding this right?... Concerning SCSI, are LVD and SE (single ended) mutually exclusive? That is, if I have a system that supports LVD drives, I want to configure those drives for LVD and not SE which would yield a smaller bandwidth? Like 1/2 at best, right? Finally, I have a Tyan S2468UNG motherboard with Ultra160 SCSI onboard (dual channel). I'm looking at pairing two Seagate 15K.3 (ST336753LW) drives with this board. Are these a good choice? Would I get better performance from having both drives on the same channel (and so, cable)? or would it be better to put one on channel A and the other on channel B (separate cables)? In the future I would like to add a third LVD drive (probably the same model with larger capacity). Again, all on the same channel? or split to second channel? I'm guessing the dual channel approach would yield better performance when writing across separate physical disks. Especially if three drives are involved. As always this list is a great resource. Thanks. Alex - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Alexander Sendzimir 802 863 5502 Mac Tutor of Vermont, LLC info @ mactutor . vt . us Colchester, VT 05446